Skin Treatment Progress
A psoriasis patient comes back after three months and asks the obvious question: “Is it actually getting better?”
It sounds easy to answer. With chronic skin conditions, it often isn’t. Psoriasis and atopic dermatitis flare, settle down and flare again, sometimes for years. A patch that looks calm today may be worse than it was at the first visit, or much better. Skin treatment decisions need something firmer to track this situation.
That’s the job of a dermatology EHR (electronic health record). It collects pictures, prescriptions, symptoms, and severity scores, visit by visit, in one timeline. That lets a dermatologist put today’s skin next to day one and see what has really changed with the skin treatment.
This blog explores in detail as to how a digital record supports tracking treatment progress in dermatology practices.
What Goes into the Record?
A digital dermatology record develops with each visit that a patient makes to the doctor. During the initial consultation, symptoms get recorded and their onset duration is noted. Later on, all the relevant clinical findings are documented under the individual profile of every patient. During subsequent visits, the record is updated along with patient personal experiences, and treatment is provided accordingly. Moreover, when diagnostic tests are performed, their relevant reports are also added to the record.
Clinical Photos
A written note may describe a lesion as red or inflamed, but a photograph gives a clearer record of its appearance. This is particularly useful when monitoring changes over several appointments of skin treatment. However, the photos need to be taken in much the same way each time. If the lighting, camera angle or distance changes, it becomes harder to tell whether a lesion has actually improved.
Medication History
Drug, strength, dose, start and stop dates, and, most usefully, why something changed. For instance, “stopped methotrexate due to nausea” is far more helpful at visit eight than a bare end date.
Symptoms
Itch, pain, and lost sleep can be recorded as numbers too. For eczema, the HOME initiative recommends the Patient-Oriented Eczema Measure (POEM) and a 0–10 rating of the worst itch in the past 24 hours.
Procedures
For peels, laser sessions or phototherapy, the record should capture the treated area, the device or agent, and the settings. Phototherapy shows why. Narrowband UVB starts at a dose based on skin type and is raised step by step, so each session’s dose, the running total and any burning reaction need to be logged.
Using Clinical Scores to Measure Skin Treatment Progress
Photos and notes document changes over time, while validated scoring systems help quantify disease severity and measure treatment response.
Eczema
The Eczema Area and Severity Index rates the severity by body area, with the redness, thickening, scratch marks and lichenification (blemishes) being weighted and the total score being from 0 – 72. Published bands put 1.1–7 as mild, 7.1–21 as moderate and 21.1–50 as severe. The patient, who goes from 28 to 7, has improved by 75% (EASI-75), and a change from severe to mild.
Psoriasis
Physician Global Assessment is a single overall evaluation of redness, thickness and scale ranging typically from 0 (clear) to 4 (severe). In clinical trials, the PASI is used and graded on a scale of 0-72 with PASI 75, 90 and 100, indicating at least 75%, 90% and 100% improvement from baseline.
Body Surface Area (BSA)
BSA is the share of skin involved. A patient’s whole hand, palm, and fingers cover roughly 1%. Under 3% for psoriasis is generally considered mild, 3–10% moderate, and over 10% severe.
For example, BSA drops from 12% to 5%. That’s real progress, from severe to moderate. It’s also only about a 58% improvement, falling short of the National Psoriasis Foundation’s acceptable response at three months (BSA of 3% or less, or at least 75% improvement) and well short of its target of 1% or less . With both numbers side by side in the chart, the next conversation is easy.
BSA measures extent, not intensity of individual lesions. A plaque that thins without shrinking won’t show up in BSA, which is why it’s often paired with PGA.
Acne: Lesion Counts
Clinicians can count inflammatory lesions (papules, pustules, nodules) separately from non-inflammatory ones (open and closed comedones). Counts won’t pick a treatment on their own. What they reveal is the pattern, such as comedones hanging on while inflammation settles. The American Academy of Dermatology (AAD)’s 2024 acne guideline notes that grading acne consistently can support treatment decisions and help judge response.
Hair Density
For hair loss, trichoscopy or a phototrichogram counts hairs in a marked patch of scalp, reported as hairs per square centimeter. Normal density varies a lot between scalp regions and populations, so the same spot has to be measured each time for the comparison to hold up.
Skin Barrier Function: Transepidermal Water Loss
TEWL measures how much water escapes through the skin, and it tends to increase in atopic dermatitis. But the results are sensitive to environmental conditions. Standard guidance calls for a room around 20–22°C, 40–60% humidity, and 15–30 minutes of acclimatizatio n. TEWL is mostly a research tool rather than routine clinic practice. Where it is used, each reading should be stored with the room conditions and site, so a clinician can tell whether a change reflects the skin or the room.
EHR Features That Make Treatment Tracking Easier
The better EHRs add tools built for this:
• Trend charts that plot EASI, PASI, BSA, or lesion counts across visits to make changes easier to identify.
• Condition-specific templates that capture the same fields every time, such as separate lesion counts for acne or affected sites and repigmentation for vitiligo.
• Care-plan targets, like the psoriasis goal of BSA at or below 1% three months after starting treatment.
• Shared records, so a covering clinician doesn’t start from scratch.
• Lab and pathology interfaces that file biopsy reports and monitoring labs straight into the chart.
• Registry reporting. The AAD’s DataDerm registry , built on structured EHR data, held records on more than 15 million patients by the end of 2023.
The Bottom Line
The digital record is only as good as what goes into it, and real-world data isn’t encouraging. In one large USA EHR dataset, only 2.3% of roughly 446,000 psoriasis patients had any BSA recorded. In another study, just 22% of patients labeled “mild” actually had BSA under 3%.
More software won’t fix that on their own. Practices need to agree on which scores to record for which conditions, how photos are taken and where each number lives, then set up their EHR templates to match. Do that, and the record stops being an archive of visits and starts showing whether treatment is actually working
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Skin Conditions causing Itching (Pruritis), Dermatitis (Eczema), or Rash