How to Track Vitiligo Progress: Photography, VASI Scoring, and Timelines

Vitiligo moves slowly. Repigmentation, when it happens, often happens gradually enough that you cannot perceive it week to week. Without a systematic approach to tracking, patients regularly either miss real progress (becoming discouraged and stopping treatment that is actually working) or miss new spread (failing to notice that a patch has grown).

A consistent tracking system fixes both problems.

Why tracking matters

The standard treatment timeline for vitiligo is long — typically six months to a full year before you can assess whether a treatment is producing meaningful response. In that period:

• Patches may be visually stable while repigmentation is actively occurring underneath, not yet visible to the naked eye
• New small patches may appear while existing ones respond
• Treatment side effects may be confused with treatment failure
• Physicians need comparable baseline and follow-up data to make treatment decisions

Without documentation, all of these situations are harder to navigate. With it, you have objective data — not memory or impression.

Photography: the core of vitiligo tracking

Photography is the most practical tracking tool available to patients. You do not need specialist equipment, but consistency matters more than image quality.

The protocol

Choose fixed body positions: For each area you are tracking, define a specific standing or sitting position and distance from the camera. Slight angle changes make patches look dramatically different in size. Use a reference point — “standing against the bathroom door, arm extended” — that you can replicate exactly.

Use consistent lighting: Natural light from the same window, or a consistent artificial light source. Flash can wash out contrast; avoid it if possible. The same light source each time matters more than the “best” light source.

Use a consistent distance and zoom: If using a phone, set your camera app to a fixed zoom level and hold it at approximately the same distance. A sticky tape marker on the floor for your feet and one on the wall for the phone position eliminates guesswork.

Photograph at the same time of day: Tanning and redness from recent outdoor exposure, or pallor from cold, can make patches look larger or smaller. Same time of day, similar recent sun exposure gives the most comparable images.

Photograph on a fixed schedule: Monthly is the right interval for most patients — frequent enough to track change, infrequent enough that each comparison shows a meaningful time gap. Biweekly if you are in the early phase of a new treatment.

Include a scale reference: A ruler or a known object in the frame (a coin, a finger) allows rough size estimation when comparing images months apart.

What to photograph

• All patches you are treating
• The edges specifically — new spread is most visible at borders
• Areas you are not treating, as monitoring zones

Store images in dated folders. The simplest system: a folder per month, named by date (2026-05-14). Review quarterly, not constantly — frequent self-monitoring can become anxious and unhelpful.

Understanding VASI scoring

The VASI (Vitiligo Area Scoring Index) is the clinical research standard for measuring vitiligo extent. Understanding it helps you interpret clinical trial results and communicate more precisely with your doctor.

How VASI is calculated

The body is divided into five zones:

1. Head and neck
2. Upper extremities (hands and arms)
3. Trunk
4. Lower extremities (legs)
5. Hands and feet

For each zone, two numbers are multiplied:

• Body area % — what percentage of that zone is affected by vitiligo
• Depigmentation % — within the affected patches, how completely depigmented is the skin (10%, 25%, 50%, 75%, 90%, or 100%)

The results across zones are summed to give a total VASI score ranging from 0 (no vitiligo) to 100 (100% of skin fully depigmented).

How VASI is used in clinical trials

Trial endpoints often use VASI improvement rather than absolute score. For example, the TRuE-V trials for Opzelura reported percentage of patients achieving ≥75% improvement in facial VASI (F-VASI75). This means 75% improvement in the facial score — not full clearance, but substantial.

When you read clinical trial results, check whether they report:

• Total body VASI (T-VASI) — whole body
• Facial VASI (F-VASI) — face only, often reported separately because it responds best
• F-VASI75 or T-VASI50 — the percentage of patients achieving ≥75% or ≥50% improvement

This matters for interpreting what trials are actually showing.

Can patients self-score VASI?

With some care, yes. The simplified version:

1. Identify each affected body zone from the list above
2. Estimate what percentage of that zone is covered by vitiligo (total patch area)
3. Estimate how depigmented those patches are (complete white = 100%; faint, patchwork colour returning = 25–50%)
4. Multiply and sum

You will not achieve clinical-trial precision, but a self-estimated VASI gives you a structured way to track whether your overall extent is changing. A decrease from your baseline estimate is meaningful signal; an increase warrants review.

The VETI alternative

The VETI (Vitiligo Extent Tensity Index) is a newer scoring system designed to be more practical and reproducible than VASI. It uses body surface area diagrams and is increasingly used in newer trials. You are less likely to encounter it in patient-facing materials, but it may appear in more recent research.

Realistic repigmentation timelines

The most common reason patients stop effective treatment is the expectation that results should come faster than they do. Here are realistic windows based on clinical evidence:

Treatment	When to expect first signs	When to assess full response
Narrowband UVB (3×/week)	3–4 months	12–18 months
Opzelura applied twice daily	4–8 weeks (early signs); meaningful response	52 weeks
Tacrolimus twice daily	2–4 months (face)	6–12 months
NbUVB + Opzelura combined	6–12 weeks (early signs)	52 weeks

First signs of repigmentation typically appear as perifollicular dots — small islands of colour around hair follicles, often easiest to see at the edges of patches. On darker skin these dots are highly visible; on lighter skin they can be subtle. Their appearance is a positive indicator: it means melanocytes are alive and beginning to produce pigment.

Full colour matching — where repigmented areas reach the exact shade of surrounding normal skin — takes longer, particularly on darker skin where more melanin must be produced to match the baseline.

When to escalate

Your tracking system should flag two scenarios for clinical review:

New patches or rapid spread: if your photographs show clear growth in existing patches or new patches appearing despite treatment, discuss this with your dermatologist. Active spreading disease may warrant a treatment change or addition.

No response after the expected window: if you have been on phototherapy consistently for six months or Opzelura for nine months with no visible response at all (not even perifollicular dots in responsive areas), it is reasonable to discuss whether the treatment is working or whether a different approach is warranted.

The vitiligo symptoms and growth patterns guide helps interpret what you are seeing. The treatment options comparison is useful context if you are thinking about a change.

A simple patient tracking sheet

For each session (monthly):

• Date
• Treatment in use and duration
• Photographs (filed by date)
• Any new patches observed?
• Any change in existing patch borders?
• Self-estimated VASI (rough)
• Any side effects or concerns

Bring the dated photographs to dermatology appointments. Clinicians can assess change much more accurately with your photo record than from clinical examination alone.