Case lab: review a routine that did not work
A disappointing result is information, not a signal to double every active. Diagnose the *plan*, not the person, with exposure, expectation, endpoint and safety checks.
Start with what 'did not work' means
A user reports 'nothing changed' after two weeks of sunscreen, moisturiser and a pigment serum. Tightness actually improved, but old dark spots looked similar. That is not a zero-result routine: comfort and pigment are different endpoints. Identify the priority outcome and whether the planned time frame suits its biology.
Case lab: review a routine that did not work — a published visual reference for the topic, not SESH product-test data.
Open full-size image ↗Check application, not blame
Ask about sunscreen quantity, reapplication when relevant, cosmetic use frequency, interruption, irritation, photos taken in consistent lighting and concurrent changes. A labelled SPF is a test rating, not proof it was applied adequately. The real third-party photograph is only a sunscreen-use visual, not a record of this hypothetical user's adherence.
Define decision thresholds
Comfort may improve over shorter intervals while spots need a different review horizon. Increasing multiple exfoliants to force faster pigment change could worsen irritation and marks. Persistent burning, spreading rash or deep painful acne needs appropriate evaluation; do not call worsening a necessary 'purging' phase automatically.
A better audit template
Record the intended target, baseline, elapsed time, product usage, exposure variables, actual measured changes and adverse effects. Write: 'hydration comfort improved, pigment unchanged so far, adherence uncertain'. This is stronger than 'product failed' or 'customer used it wrong'.
Locate ultraviolet and visible light within the spectrum. This is not a sunscreen protection test; protection must be assessed from product data and testing.
Open full-size image ↗Your lab · decide before revealing answer
A client sends two photographs taken in different lighting and says her pigment serum failed after fourteen days, even though dryness improved. Your colleague suggests adding a strong peel immediately. Write a monitoring decision.
Reveal analysis after making your decision
Model reasoning and safety decision
Document the distinct outcomes, standardise photographs, check product use and sun protection, and review pigment after a realistic period without adding multiple irritants. Persistent or severe symptoms require clinical review. Two mismatched images cannot establish lack of efficacy.
Further research
Related SESH references
Links do not establish treatment of the hypothetical condition.
Cases are fictional training exercises, not clinical diagnoses.
