Crohn's Eye and Skin Symptoms: What to Log

Updated 29 Oct 2026

Red eyes or a sore patch on the shin are easy to file under something else. With Crohn's, they may be part of the same picture, and your IBD team will ask about them.

This guide explains what to log about eye and skin symptoms with Crohn's: what to note for each, how to line them up with gut days, what to record about medicines, and when to tell your team.

Why log eye and skin symptoms with Crohn's

NIDDK lists eye redness or pain and skin changes such as red, tender bumps under the skin among the other symptoms of Crohn's disease (NIDDK). Crohn's & Colitis UK says commonly affected areas outside the gut include joints, eyes, and skin, and that these problems usually happen during a flare-up but can occur without or before any gut symptoms (Crohn's & Colitis UK).

It also notes that doctors may ask about symptoms involving your mouth, skin, eyes, joints, or around your bottom when they take the history of your symptoms (Crohn's & Colitis UK).

Because these symptoms can come before, with, or without gut symptoms, a single note made on the day is worth more than trying to remember the order later. Dates are what make the timing clear.

In Crohn's Journey, the Daily check-in keeps symptoms beside energy, pain, and sleep each day.

What to log about your eyes

Crohn's & Colitis UK describes episcleritis as making your eyes red, itchy, and sometimes painful, and says it tends to flare up at the same time as Crohn's symptoms (Crohn's & Colitis UK). It describes uveitis and scleritis as serious, able to lead to loss of vision if not treated, with symptoms that include pain, changes in vision, and sensitivity to light (Crohn's & Colitis UK).

So for each eye entry, write the date and time, which eye, and each of these in plain words: redness, itch, pain with a 0 to 10 score, any change in vision, and whether light bothered you. Those fields separate the milder picture from the one the source calls serious.

The same page notes that conjunctivitis causes redness and irritation and produces sticky pus (Crohn's & Colitis UK). If you see that, write it down too, as the description helps your clinician tell the conditions apart.

In Crohn's Journey, the Daily Journal holds each eye entry, including voice notes.

What to log about your skin

Crohn's & Colitis UK describes erythema nodosum as raised, painful patches of skin that look red or darker than the surrounding skin, often found on the legs (Crohn's & Colitis UK). It describes pyoderma gangrenosum as starting as small tender blisters or pustules that become painful, deep ulcers, and notes that on brown or black skin the skin around the edge of the ulcer might be darker (Crohn's & Colitis UK).

It describes Sweet syndrome as tender red lumps on the upper limbs, face, and neck, sometimes with a fever, and notes the color of the lumps can differ depending on skin tone (Crohn's & Colitis UK).

For each skin change, write the date, the place on the body, the size compared with something common, such as a coin, how it feels, and its color compared with the skin around it. Add a temperature reading if you felt feverish. Use the same name for the same patch every time.

In Crohn's Journey, the Flare Tracker records the category, intensity, and duration of clearly worse days.

How to line them up with gut days

Crohn's & Colitis UK says erythema nodosum usually occurs during flare-ups, that episcleritis tends to flare up at the same time as Crohn's symptoms, and that Sweet syndrome is generally associated with active Crohn's (Crohn's & Colitis UK).

To see whether that holds for you, keep stool, pain, and urgency notes on the same days as your eye and skin entries. Then, once a month, list the dates of each eye or skin entry and mark which fell in a flare week, which came before one, and which came on a quiet week.

That short list answers the question your IBD team is likely to ask, and it shows them anything that does not follow your gut symptoms.

For joints, see joint pain weeks next to gut symptoms.

In Crohn's Journey, the Stool Tracker (Bristol Scale) keeps stool form, urgency, and blood beside the same dates.

What to log about medicines and treatment

Crohn's & Colitis UK says episcleritis often gets better with treatment for Crohn's or with steroid eye drops, that erythema nodosum usually improves with treatment for Crohn's, and that pyoderma gangrenosum is often treated with steroids or biologic medicines (Crohn's & Colitis UK).

So keep every medicine with its start date and dose, including any eye drops or skin creams you were given, and note the date each eye or skin symptom eased. Then the timeline shows what was in use when things improved.

The same source lists disruptions or changes in medicines among the possible flare-up triggers, and advises taking your medicines as prescribed by your IBD team, even when you feel well (Crohn's & Colitis UK). Note any missed or changed doses on the day.

For a full medicine record, see how to track Crohn's meds.

In Crohn's Journey, My Meds keeps names, doses, and dates beside symptom days.

When to tell your IBD team

Crohn's & Colitis UK advises that if you get any kind of painful eye irritation, redness, or inflammation, you tell your healthcare professional, and notes they may refer you to an eye specialist (Crohn's & Colitis UK). It also advises always telling your IBD team if you have new symptoms anywhere in your body so they can be investigated (Crohn's & Colitis UK).

It suggests asking your IBD team how best to alert them if you become unwell, for example by sending an email with Flare-up in the subject line (Crohn's & Colitis UK). Write the agreed route in your log so it is there when you need it.

When you contact them, read from the log: the dates, which eye or where on the skin, the fields you noted, and what your gut symptoms were doing. Write down what they advise, with the date.

For short visits, see what to bring to a short Crohn's visit.

In Crohn's Journey, the Doctor Report builds a dated summary for a doctor saved in My Care Team.

How Crohn's Journey can help

A notebook can hold dates. The harder part is keeping eye, skin, stool, pain, and medicines in one dated record, so the timing is clear when your team asks.

Crohn's Journey is a personal Crohn's tracker from Health Journey Labs on the App Store and Google Play. It records stool, pain, flares, medicines, and labs in one dated history. For a side-by-side look at trackers, see the best Crohn's disease apps in 2026. Below is what you can use and how each part helps:

• My Meds — Medicine names and timing, including biologics, steroids, or other options you use, so you can line up timing with stool weeks, pain, and sleep.
• Daily check-in — A short guided pass across symptoms, mood, nutrition, sleep, exercise, meds, and external factors, including energy and pain.
• Stool Tracker (Bristol Scale) — Stool form on the Bristol Scale plus color, urgency, blood amount, and pain level, so you can see how stool changes line up with meals and energy.
• Daily Journal — Freer notes, including voice when typing is hard, such as what the day limited, partner talks, or visit debriefs.
• Flare Tracker — Mark a day that is clearly worse than a normal bad day for you, with a category, intensity, and duration, so you can tell a one-off spike from a pattern.
• Weekly Goals — Set one small aim, such as a smaller evening meal or a walk after lunch, and see whether it held.
• AI companions — Clara and specialist companions, including nutrition, already see your logged history, which helps with visit wording or meal ideas.
• Doctor Report — Two views: the Appointment Planning Report, a list of questions to prepare before a visit, and Generate Report, a dated summary of your recent progress to show a doctor saved in My Care Team.
• Food Tracker — Meals and drinks, so you can see whether certain foods come before more pain, urgency, or tiredness.
• My Labs — Result dates for blood counts, stool tests, calprotectin, imaging, or other tests, so each result sits next to how you felt that month.
• Weight Tracker — Weight entries when weight loss, nutrition, or clinic weigh-ins are being watched.
• Learn — Short education topics on flare-ups, pacing, bathroom urgency, and visit preparation.
• My Assessments — Structured check-ins that add context about you across weeks.
• My Care Team — A profile for each clinician, plus visit notes used before, during, and after appointments.
• Period Tracker — Cycle dates and flow, so you can line up cycle timing with pain, stool, or energy.

Everything you log builds one history. Guided forms include the key questions, and you can add custom symptoms when you need your own labels. Crohn's Journey is free to download.

Sources

• Crohn's & Colitis UK — Crohn's Disease
• NIDDK — Symptoms & Causes of Crohn's Disease

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