Updated 4 October 2026
At a glance
- Cleveland Clinic lists rapid heart rate, weight loss, increased appetite and anxiety as symptoms of an overactive thyroid, and MedlinePlus lists a rapid heartbeat for anxiety, so one symptom can appear on both lists.
- A table pairs each thing you hear with what a dated log can show and who can say what it means.
- A symptom overlap map, two weeks of log steps, questions for a clinician and a checklist follow.
- Hashimoto’s Journey keeps symptoms, flare days, result dates and visit notes in one dated history, so the log you bring has dates beside every entry.
A racing heartbeat, restlessness or a short temper can bring two opposite answers: it is anxiety, or it is your thyroid. Both answers are sometimes said with the same confidence, and neither one comes with a date, a count or a record.
This guide does not choose between them. It sets out what the sources list for each, a table of the things you hear and what a dated log can show for each, steps for two weeks of log, questions for a clinician, and what a log cannot say.
Why can Hashimoto's and anxiety look alike in the symptoms the sources describe?
Because some symptoms appear on both lists. Cleveland Clinic writes that an overactive thyroid causes symptoms like rapid heart rate, weight loss, increased appetite and anxiety, and MedlinePlus says anxiety might cause you to sweat, feel restless and tense, and have a rapid heartbeat. A rapid heartbeat is on both lists.
The link to Hashimoto's is a specific one. The National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) states that rarely, early in the course of the disease, thyroid damage may lead to the release of too much thyroid hormone into your blood, causing symptoms of hyperthyroidism. Most of what Cleveland Clinic lists for the disease itself is different: fatigue, weight gain and constipation.
The sources do not say how to tell a racing heartbeat caused by one from the other; that takes a clinician and their tests. What a person can contribute is a dated description of what happened, when and with what else that day.
Do the sources say that Hashimoto's causes anxiety?
No. The cited pages list anxiety among the symptoms of an overactive thyroid and list a rapid heartbeat for anxiety. They do not say that one causes the other.
Does this guide help me decide which one I have?
No. It helps you write down what you notice so that a clinician has dates to work from.
The Daily check-in records physical symptoms, emotional state, sleep and outside factors, with energy, cold sensitivity, brain fog and mood among its fields. With Hashimoto’s Journey (by Health Journey Labs), a racing-heartbeat day is written in the same daily answers as a calm one, so the two can be compared.
What you hear vs what the log can show: a table by who can say
Each row takes a sentence people say and pairs it with what a dated log can add and who can say what it means.
Table of who can say what, by Hashimoto’s Journey
| What you hear | What a dated log can show | Who can say what it means |
|---|---|---|
| "It is just anxiety." | The dates of a racing heartbeat or nervousness, and what else was logged on those days | A clinician, with your history |
| "It is your thyroid." | The same dates, beside the dates of any thyroid test | A clinician, with the test results |
| "It could be both." | Whether the entries cluster on certain days or weeks | A clinician who reads the whole record |
| "Your numbers look fine." | The result dates and the symptom weeks around them, with no reading of the numbers | The clinician who ordered the tests |
| "It will pass." | How many days it lasted and how it changed from week to week | A clinician, if it changes quickly or causes worry |
The table sets out what each sentence leaves open. A log cannot settle the argument, and it can give the person who reads it dates, counts and a sequence in place of a feeling. The middle column is the part you control. Keeping the same wording each time makes the entries comparable across weeks.
A day clearly worse than a usual week is flagged in the Flare Tracker, with energy, fog, cold, mood, joints or hair stress as examples, and it shows whether the day was a one-off or repeats. In Hashimoto’s Journey, the middle column of the table is filled from flagged days.
Symptoms listed by thyroid sources and by anxiety sources: where they overlap
The map puts the symptoms that each source lists side by side, so the overlap is visible and the differences stay in view.
Table of symptoms from thyroid sources, by Hashimoto’s Journey
| Source and topic | Symptoms it lists | Shared with another list |
|---|---|---|
| Cleveland Clinic, Hashimoto's disease | Fatigue, weight gain and constipation | None of these is on the anxiety pages cited here |
| Cleveland Clinic, hyperthyroidism | Rapid heart rate, weight loss, increased appetite and anxiety | Rapid heart rate and anxiety appear on the anxiety lists |
| MedlinePlus, anxiety | Sweating, feeling restless and tense, and a rapid heartbeat | Rapid heartbeat appears on the hyperthyroidism list |
| National Institute of Mental Health, panic attacks | Trembling or tingling in the body or a rapid heart rate | Rapid heart rate appears on the hyperthyroidism list |
One symptom, a rapid heartbeat, is on three of the four lists, and the list for the disease itself has none of the anxiety symptoms. That is the only pattern the pages support. The map shows where a record is likely to need extra detail: for a racing heartbeat, the date, the day around it and what you were doing are the details a clinician can use. A guide to the worry side of this is in how to cope with Hashimoto's anxiety.
Custom symptoms let you add your own labels, so a racing heartbeat or nervousness gets its own row in the shared history of Hashimoto’s Journey. Insights and correlations strengthen as the history grows, and the overlap map then has your own entries to compare.
5 steps for two weeks of log beside your test dates
Two weeks is long enough to show a sequence and short enough to keep up; the steps below set it up in five moves.
Steps for two weeks of notes, by Hashimoto’s Journey
- Pick two labels. Choose one label for the racing heartbeat and one for nervousness, and keep them the same every day.
- Write the day, not the cause. For each label, write whether it happened and when in the day, with no explanation attached.
- Add the context in one line. Write what else the day held, such as a busy morning or a poor night, in a few words.
- Add the test dates. Write the date of any thyroid test in the same log and leave the numbers out.
- Count at the end. After fourteen days, count the days with each label and the days with both.
The steps give a clinician a count and a sequence. Step two matters most: an explanation written on the day tends to fix an interpretation before anyone has examined it. The Health Journey Labs method of counting days and not episodes keeps the log short enough to survive a bad week. How to keep notes through a rough stretch is covered in how to get through a Hashimoto's flare-like week without losing notes.
My Labs holds result dates for TSH, free T4, free T3, antibodies and other tests, read against energy, cold, fog and function. In Hashimoto’s Journey, the test dates sit in the same history as the symptom days, and the reading of the numbers stays with the clinician.
Questions for the clinician at the visit, without reading any values
Bring the two-week count and a few written questions. MedlinePlus advises that if you are having any health problems, write down a description of your symptoms, and the count is a dated version of that description.
Questions to ask, by Hashimoto’s Journey
Is it worth reviewing the dates of my racing heartbeat together with my test dates?
Show the two-week count and the dates of the tests, and ask how the clinician would read them side by side.
Is it worth reviewing the days that had both labels together?
Show the days on which both the racing heartbeat and the nervousness were logged, and ask whether they suggest anything to the clinician.
Which other entries would be useful to add to the log?
Ask the clinician which details they would find useful, and write exactly those in the next two weeks.
The questions are phrased to review the record together. They ask for no reading of a value and no decision about a medicine, and the clinician decides what the record means. For a low or worried mood, write the dates and who you contacted, and nothing more.
My Care Team lists clinicians and keeps short visit notes, and its visit prep covers what to ask and bring. In Hashimoto’s Journey, the questions of this section are written once and stay with the notes taken during and after the visit.
Checklist to bring to the visit about a racing heartbeat and nervousness
Seven lines cover what to have on paper or on a screen when you arrive.
Checklist for the visit, by Hashimoto’s Journey
- The two-week count: days with a racing heartbeat, days with nervousness and days with both.
- The dates of each entry, with the one line of context.
- The dates of any thyroid test, with no reading of the numbers.
- The names of the medicines you use and the dates of any change a clinician made.
- What the days limited, in a sentence or two.
- Up to three questions, the most important first.
- The name of whoever you contacted if the low or worried mood became heavy, with the date.
The checklist measures readiness. Each line is ready or missing, and a missing line is a reason to fill it the evening before. From Hashimoto’s Journey, we recommend keeping the count and the context lines on one page, so the clinician reads them in one pass (Hashimoto’s Journey checklist).
The Doctor Report is a one-page summary exported from the logged history, with dates, energy, cold, fog, medication entries and how you functioned. With Hashimoto’s Journey, the count and the dates are on one page that was built from entries you already made.
What the log cannot say
A log has limits, and knowing them keeps it useful. Four things it leaves to others:
- Which explanation fits: only a clinician with tests and history can weigh that.
- What a test number means: the clinician who ordered the test reads it.
- Whether a medicine should change: that decision stays with the clinician, and the log records only the dates.
- What to do on a bad day: a log records the day and gives no instruction for it.
If symptoms change quickly or cause worry, contact a clinician instead of waiting for the two weeks to finish. If the low or worried mood becomes heavy, contact a clinician or someone you trust, and keep the local emergency number for danger. Starting a log before any diagnosis is described in how to start tracking Hashimoto's before a diagnosis.
AI companions already see the logged history and are used for visit wording, a calm script for a partner or a listening ear after a week with more symptoms. In Hashimoto’s Journey, they help word a question, and the log supplies the facts behind it.
How Hashimoto’s Journey can help
A notebook page with two labels and a count is enough to start. When you would rather keep the log on a phone, Best Hashimoto's Apps 2026 sets out what a Hashimoto's tracker can hold before you choose one.
Hashimoto’s Journey is a personal Hashimoto's tracker from Health Journey Labs on the App Store and Google Play. It lets you keep symptoms, flare days, result dates and visit notes in one dated history, so a racing heartbeat is recorded with the days around it. Across weeks, the history shows whether a rise was a one-off or repeats, and the Doctor Report turns the dates into one page for the clinician. Below is what you can use and how each part helps.
- Daily check-in — A guided daily pass for physical symptoms, emotional state, nutrition, sleep, exercise, medicines and outside factors, with energy, cold sensitivity, brain fog and mood among its fields.
- Daily Journal — Free-text and voice notes for what the day limited, medication notes, partner talks, visit debriefs and leftover guilt after you canceled.
- Flare Tracker — Marks a day clearly worse than a usual week with onset, intensity and a short note, with energy, fog, cold, mood, joints and hair stress as examples.
- My Meds — Medicine names and medication entries for the options you actually use, read against energy weeks, sleep, cold and fog.
- My Labs — Result dates for TSH, free T4, free T3, antibodies and other tests, read against energy, cold, fog and function.
- Weekly Goals — One small aim for the week and whether it held, read against the real check-ins.
- Learn — Short education topics and prompts on fatigue, fog, cold, levothyroxine, visit prep and weeks that look fine from outside, read with your own logged weeks.
- AI companions — Clara for general chat and specialist companions that already see the logged history, used for visit wording, a calm script for a partner or a listening ear.
- My Care Team — Lists clinicians and keeps short notes before, during and after a visit, so what to ask and bring stays with the history.
- Doctor Report — A one-page summary exported from the logged history, with dates, energy, cold, fog, medication entries and how you functioned.
- My Assessments — Structured check-ins beyond the daily scores, plus life and social context from onboarding, read with the ongoing history.
- Food Tracker — Meal or drink lines, with caffeine and alcohol.
- Period Tracker — Start and stop dates, flow and how heavy or light bleeding felt, read against flares, energy, sleep, mood and cold.
- Weight Tracker — Scale or body notes, read against energy, sleep, cold and labs.
Everything you log builds one history, and insights get stronger as it grows. Custom symptoms let you add your own labels.
We make Hashimoto’s Journey at Health Journey Labs. This guide is educational and does not replace medical advice. Diagnosis, medication decisions, and urgent care decisions belong with your treating clinicians.
Sources
- Cleveland Clinic — Hashimoto's disease
- National Institute of Diabetes and Digestive and Kidney Diseases — Hashimoto's disease
- Cleveland Clinic — Hyperthyroidism
- MedlinePlus, National Library of Medicine — Anxiety
- National Institute of Mental Health — Panic disorder: when fear overwhelms
- MedlinePlus, National Library of Medicine — Talking with your doctor
FAQ
The answers below draw on the sources cited in this guide, and the app they mention is Hashimoto’s Journey (by Health Journey Labs).
Which labels should I use for the log?
One for a racing heartbeat and one for nervousness, in your own words, kept the same every day. Two labels are enough to count, and a new label each day makes the entries impossible to compare across the two weeks, so resist the urge to refine the wording midway.
Custom symptoms in Hashimoto’s Journey let you add your own labels to the shared dated history, so the racing heartbeat and the nervousness each get a row and are counted like any other symptom in the log.
Why does a rapid heartbeat appear on both lists?
Because the cited pages for an overactive thyroid and for anxiety each include it. The pages do not say how to tell the two apart, which is for a clinician, so the practical step is to log the heartbeat with its date and the context of the day and let the pattern accumulate.
The Daily check-in in Hashimoto’s Journey records physical symptoms and outside factors for each day, so the days of a rapid heartbeat can be read with what else the day held, without any extra writing.
What does the early phase of Hashimoto's mean for symptoms?
It is a rare and early stage, according to the NIDDK page cited above, and it is the only route by which the disease itself connects to the overactive list. For a log, it means a racing heartbeat can have a place in either story, and the dates are what help a clinician sort it out.
Hashimoto’s Journey keeps every entry in one shared dated history, and insights and correlations strengthen as it grows, so a change in the pattern of symptoms across months is visible in the same place as the earlier entries.
Should I write down my thyroid test numbers?
Write the name of the test and its date, and leave the numbers to the clinician who ordered it. The dates are what let the symptom days be placed beside the tests, and a number written without its context can be misread by anyone, including you, when you look at it again.
Hashimoto’s Journey keeps a place for the dates of thyroid tests in the same shared history as the symptom days, in My Labs, so a test date and the week around it are read together by the clinician.
Who do I contact if the racing heartbeat changes quickly?
Contact a clinician when symptoms change quickly or cause worry, and do not wait for the two weeks to finish. If something feels like an emergency, the local emergency number is the one to use, and a clinician can say what the next step is.
The Flare Tracker in Hashimoto’s Journey marks a day clearly worse than a usual week, with onset, intensity and a short note, which gives a clinician a dated description of the change and how it compares with earlier weeks.
What if low or worried mood is part of the picture?
Record the dates on which it was heavy and who you contacted, and keep to that. A clinician or someone you trust is the person to reach when the mood becomes heavy, and the local emergency number is there for danger; the log gives no advice about mood.
The Daily check-in in Hashimoto’s Journey has mood among its fields, so heavy days are dated in the same answers as the rest of the history and are available for the clinician to read.
How do I answer when someone says it is just anxiety?
You can say that you are keeping a dated log and will bring it to a clinician. That answers without arguing, and it moves the question from opinion to record. You do not have to defend the log to the other person or show it to them.
The AI companions in Hashimoto’s Journey already see the logged history and are used for a calm script for a partner or a listening ear after a week with more symptoms, so the words are ready before you need them.
Why two weeks?
Two weeks is long enough to show a sequence of days and short enough to keep up when you feel unwell. The cited pages give no recommended length, so the period is a convention of this guide, and a clinician may ask for a longer or a shorter one.
Weekly Goals in Hashimoto’s Journey records one small aim for the week and whether it held, so keeping the log for the two weeks can be set as an aim and checked against the real check-ins.
Should I list my medicines in the log?
Yes, as names with dates, including the date of any change a clinician made. A question about an item can be asked as whether it is worth reviewing together; deciding anything about a medicine is left to the clinician who prescribed it.
My Meds in Hashimoto’s Journey records medicine names and medication entries for the options you actually use, read against energy weeks, sleep, cold and fog, so the dates are available at the visit without searching through old notes.
What do I bring to the visit?
The count, the dates and up to three questions, with the most important question first. A page of dated entries lets the clinician see the two weeks quickly, and a written question is more likely to be asked than one you meant to remember in the room.
My Care Team in Hashimoto’s Journey lists clinicians and keeps short visit notes, and its visit prep covers what to ask and bring, so the questions stay with the notes of the visit and are easy to find again afterward.
Can the log fit on one page?
It can, if you keep the counts and one line of context for each entry. A page with the two labels, the number of days of each and the test dates reads in a minute, and the longer record can stay in your notes in case the clinician asks about a particular day.
In Hashimoto’s Journey, the Doctor Report exports a one-page summary from the history you already logged, so the dated count is on a single page and is not retyped before the visit.
Is a paper log enough?
A paper log with a column for each label and a row for each day holds the same information. Choose the format that you will fill in every evening for fourteen days, because a log with gaps is harder to read than a short one kept every day.
Hashimoto’s Journey keeps the same entries on a phone, with calendar view and weekly and monthly views that color days by intensity, so the two weeks can be seen at a glance before the count is made.
What if brain fog and fatigue are the bigger problem?
Log them the same way, as days with a label and a line of context. The cited page for the disease itself lists fatigue, weight gain and constipation, so fatigue is a sensible second label, and the count works the same way for any label you choose.
The Daily check-in in Hashimoto’s Journey has energy and brain fog among its fields, so fatigue and fog days are counted from the same daily answers as the racing-heartbeat days, week after week.
How do I explain this log to a partner or family member?
Say that you are writing down what you notice, with dates, so that a clinician can read it. You are not asking them to decide which explanation is right. A short sentence is usually enough, and they can help by not asking for a verdict before the two weeks are done.
The Daily Journal in Hashimoto’s Journey takes free-text and voice notes, including partner talks and visit debriefs, so what was said and what you asked for is written on the same day and kept with the dated history.
How do I keep privacy in check with my health log?
Thyroid lab values, medicine dose changes and notes on weight or mood are easy to misread out of context. Lock the device, store printed lab results away from shared spaces, and share the dose timeline only with the clinicians who adjust it.
Entries you add to Hashimoto’s Journey are your own health notes. Check the app's privacy policy for how data is stored and handled. Nothing in this article is medical advice.