Updated 29 Oct 2026
At a glance
- The NHS lists losing your hair and getting skin rashes, such as hives, among symptoms of long COVID (NHS long COVID guidance).
- It says the main symptom of hives is an itchy rash, and that hives rashes usually get better within a few days (NHS hives guidance).
- It advises calling 999 if your lips, mouth, throat, or tongue suddenly become swollen, or you are struggling to breathe (NHS hives guidance).
- Long Covid Journey is a phone app (iPhone and Android) for tracking Long Covid that keeps symptoms, medicines, and visits in one dated history.
Hives can come up fast and fade before anyone else sees them. With Long Covid, they can be one more symptom that is easy to describe badly at an appointment.
This guide covers what to log about hives with Long Covid: the urgent signs, the rash, how long it lasts, possible triggers, and treatment. Your GP or Long Covid service decides the cause and the plan.
Know the signs that need 999 first
The NHS says to call 999 if your lips, mouth, throat, or tongue suddenly become swollen, you are breathing very fast or struggling to breathe, your throat feels tight or you are struggling to swallow, your skin, tongue, or lips turn blue, grey, or pale, or you suddenly become very confused, drowsy, or dizzy (NHS hives guidance). It says these can be signs of a serious allergic reaction and may need immediate treatment in hospital (NHS hives guidance). In the US, call 911 or go to the ER for these signs, and use urgent care or your primary care doctor where the NHS mentions a GP.
It advises an urgent GP appointment or NHS 111 if hives do not improve after 2 days, the rash is spreading, hives keep coming back, you also have a high temperature and feel unwell, or you also have swelling under your skin (NHS hives guidance).
These come before any log. Write the time down once you are safe.
In Long Covid Journey, My Care Team keeps your GP and service numbers.
Log the rash itself
The NHS says a hives rash can be raised bumps or patches in many shapes and sizes, appear anywhere on the body, be on 1 area or spread across the body, and feel itchy, sting, or burn (NHS hives guidance). It says the rash may look pink or red on white skin, and its color can be harder to see on brown and black skin (NHS hives guidance).
Take a photo in good light as soon as you can, since hives can fade before your appointment. Log where on the body, whether it is one patch or spread out, and an itch score from 0 to 10.
If the rash is hard to see on your skin, log what you feel instead: raised bumps, heat, stinging. Those words matter as much as the photo.
In Long Covid Journey, the Daily Journal keeps the description.
Log how long it lasts and how often
The NHS says hives rashes usually get better within a few days (NHS hives guidance). It advises getting help if symptoms do not improve after 2 days, or if hives keep coming back, which may mean you are allergic to something (NHS hives guidance).
Log the start time, when the rash faded, and whether it came back the same day. Count episodes per week. A run of repeats is exactly what the NHS advice above is asking you to notice.
For long COVID, it lists many symptoms, including extreme tiredness, joint pain and aching muscles, brain fog, and difficulty sleeping (NHS long COVID guidance). Tick any that were worse on hives days.
For crash days, see Long Covid PEM crash days.
In Long Covid Journey, the Flare Tracker marks rash days.
Log possible triggers
The NHS says you get hives when something causes high levels of histamine and other chemicals to be released in your skin, known as a trigger (NHS hives guidance). Triggers can include eating certain foods, contact with certain plants, animals, chemicals, and latex, cold water or wind, hot, sweaty skin from exercise, emotional stress, or spicy food, a reaction to a medicine, insect bite, or sting, scratching or pressing on your skin, and an infection (NHS hives guidance).
It suggests trying to find out what triggers hives for you so you can avoid them, if possible (NHS, Hives). Beside each episode, log what you ate, any new product, exercise or heat, tight clothing, new medicines, and stress in the hours before.
If exertion brings on hives, log it alongside any crash that follows. For the shape of crashes, see how long a Long Covid PEM crash lasts.
In Long Covid Journey, the Food Tracker keeps meals.
Log treatment and bring the record
The NHS says a pharmacist can advise on antihistamine treatment, and to tell the pharmacist if you have a long-term condition, because you might not be able to take antihistamines (NHS hives guidance). It says a GP might prescribe menthol cream, antihistamines, or steroid tablets, and may refer you to a skin specialist if hives do not go away (NHS hives guidance).
For long COVID, it lists support that can include using tools like apps to track your symptoms (NHS long COVID guidance).
Log what you took, when, and an itch score a few hours later. Bring photos, episode counts, triggers, and treatments to your GP or Long Covid service. For the wider story, see rebuilding the Long Covid story for the next visit.
In Long Covid Journey, My Meds keeps treatments and the Doctor Report brings it together.
How Long Covid Journey can help
A notebook can hold one bad day. The harder part is keeping rashes, triggers, and treatments in one dated record.
Long Covid Journey is a personal Long Covid tracker from Health Journey Labs on the App Store and Google Play. It records symptoms, medicines, test dates, and visits in one dated history. Below is what you can use and how each part helps:
- Daily check-in — A short guided pass across symptoms, mood, nutrition, sleep, exercise, meds, and external factors, including fatigue, breathlessness, and brain fog, so links you would not remember on your own show up side by side.
- Daily Journal — Freer notes, including voice on foggy or low-energy days, that add detail a score alone cannot show.
- Flare Tracker — Mark a crash day, so you can tell a one-off bad day from a repeating pattern after effort.
- My Meds — Medicine names and timing, so you can line up a start date or dose change with symptom days.
- My Labs — Result dates for blood tests, heart and lung checks, and other tests, so each result sits next to how you felt that month.
- Weekly Goals — Set one small aim, such as a regular bedtime or a paced walk, and see whether it held and whether symptoms changed.
- Learn — Short education topics on long COVID themes such as pacing, sleep, breathing, and visit preparation.
- AI companions — Clara and specialist companions already see your logged history, which helps with pacing ideas or visit wording.
- My Care Team — A profile for each clinician, plus upcoming appointments and notes for each visit, used before, during, and after appointments.
- Doctor Report — Two views: the Appointment Planning Report helps you prepare what to ask, and Generate Report, opened from a saved doctor, builds a dated summary of your recent progress for that doctor.
- My Assessments — Structured check-ins that add context about you across weeks.
- Food Tracker — Meal and drink lines, so you can line up appetite, meals, and gut symptoms with energy.
- Period Tracker — Cycle dates, so you can see whether fatigue or crash days cluster at a certain point in the cycle.
- Weight Tracker — Weekly weights, useful when appetite is low or weight is changing.
Everything you log builds one history. Guided forms include the key questions, and you can add custom symptoms when you need your own labels. Long Covid Journey is free to download.
We make Long Covid Journey at Health Journey Labs. This guide is educational and does not replace care from your clinicians; for diagnosis and treatment decisions, work with your treating clinicians.
Sources
FAQ
Can Long Covid cause hives?
The NHS lists skin rashes, such as hives, among long COVID symptoms.
In Long Covid Journey, the Daily Journal keeps the description.
How long do hives last?
The NHS says hives usually get better within a few days; get help if not improved after 2 days.
In Long Covid Journey, the Flare Tracker marks rash days.
When are hives an emergency?
The NHS says call 999 if lips, mouth, throat, or tongue suddenly swell, or you struggle to breathe.
In Long Covid Journey, the My Care Team keeps numbers.
What triggers hives?
The NHS lists foods, heat, cold, pressure, medicines, stress, and infection among triggers.
In Long Covid Journey, the Food Tracker keeps meals.
How private is a Long Covid log?
A Long Covid log can hold symptoms, dates, and medicines. Treat any digital log as private, and on paper, keep it somewhere only you control and share it only when you choose.
The app's own security screen lists Long Covid Journey as HIPAA-ready and GDPR compliant, with AES-256 encryption for your data. You choose what to share with partners or clinicians.