Write down four things while they are happening: when the flare started, how bad it got on a 0 to 10 scale, what you were putting on your skin at the time, and anything you suspect set it off. Add a photo if the flare will be gone before your next appointment. That is the whole method. The rest of this page is why those four things, and how to keep it up without turning your skin into a second job.
Why write anything down
When I ask someone with eczema when it last flared and what they were using at the time, the usual answer is that they can't remember. That's normal. Eczema comes and goes over months, and appointments land wherever they land.
The problem is that the visit runs on those answers. Your dermatologist is trying to work out whether the current plan is working. "It flared twice in March, and the ointment settled it in about three days both times" leads to a different conversation than "it's been bad on and off, I think." The first patient and the second patient might have identical skin. Only one of them brought evidence.
What your dermatologist actually wants to see
Not an essay. A clinician reading your log mid-visit has a minute or two, not fifteen. These are the things worth that minute:
- Dates. When each flare started and roughly when it settled. "Roughly" is fine.
- Severity, on the same scale every time. 0 to 10 works, where 10 is the worst your skin has ever been. Anchoring 10 to your own worst flare keeps the numbers honest.
- Itch, rated separately. Skin that looks mild but itches enough to wreck your sleep is worth knowing about, and it doesn't show up in photos.
- What you were using, and when you actually used it. This is the one people are shy about. If you stopped the cream because it stung, or you ran out, or you just forgot for two weeks, write that down too. Nobody is grading you, and "it came back when I stopped" is genuinely useful information.
- Suspected triggers, loosely held. New detergent, a stressful week, a heat wave. Note the suspicion and move on. You're collecting leads, not proving a case.
- A photo near the worst of it, in decent light. Eczema has a habit of being quiet on appointment day. A dated photo answers questions memory can't.
A routine you can actually keep
The best log is the one that still exists in three months. Two patterns work:
- Ten seconds a day. Attach it to something you already do, like brushing your teeth. Circle two numbers, note anything unusual, done. Daily logging catches the quiet stretches, and quiet stretches are information too.
- Flare days only. If daily is not realistic, only log when something is happening. A log with gaps still beats memory.
If you miss a week, skip it and keep going. Don't backfill from memory; the whole point is that memory is the unreliable part.
Paper, a notes app, or a tracking app
Paper works. A one-page table on the fridge or folded into your wallet has no battery, no login, and nothing to configure. We made a free printable version if you want a head start.
A notes app works too: one running note, one line per day, photos in your camera roll. Its weakness shows up at the appointment, when you're scrolling through months of lines while the visit clock runs.
Tracking apps add reminders, photo organization, and a summary you can hand over. Full disclosure: I'm building one, so read my opinion of apps knowing that. If you want to compare what's out there, including apps that aren't mine, I keep an honest comparison at best eczema tracking apps in 2026.
What not to bother with
- Logging every meal, forever. If you suspect a food, note it when the suspicion strikes. Exhaustive food diaries mostly produce guilt and noise. If diet genuinely worries you, that's a conversation for your clinician, not a spreadsheet project.
- Perfect streaks. Trackers that shame you for missing days have it backwards. Gaps are fine. The log serves you, not the other way around.
- Writing paragraphs. Two numbers and a few words beat a diary entry. You will not want to write paragraphs at 11pm mid-flare, and your dermatologist will not read them.
One page beats everything. Whatever you track with, walk in with a single page: flares since last visit, severity, what you used, whether it helped. Raw data is for you. The summary is for the visit.
Questions
How often should I log?
Once a day is ideal because it catches the quiet days too. If that's not realistic, logging only on flare days still gives your dermatologist most of what they need. Use the same scale every time.
What scale should I use?
0 to 10, where 0 is completely clear and 10 is the worst your skin has ever been. Rate itch separately from how the skin looks.
Should I take photos?
If you're comfortable, yes. Near the worst of the flare, in good light, same body part and angle when you can. Keep them somewhere private.
Will my dermatologist actually look at it?
They'll scan it, not study it. One page gets used. Forty screenshots don't. Lead with the summary.
Is there a printable version?
Yes, a free one-page log with a week of severity and itch scales plus space for triggers and treatments. Join the waitlist and it downloads right away.
This page is general information about keeping records, not medical advice. For decisions about your skin, talk to your clinician.