Discoloration on forehead

A 32-year-old woman was seen at a dermatological clinic for a discoloration on her forehead that had been bothering her for two years. She claims to occasionally apply sunscreen with carrot extract to her forehead before going for a run outside. She denied any accompanying itching or soreness. There was no past medical or family history. The use of a Woods light to visualise a mild hyperpigmented patch on her central forehead with accentuation of pigment inside the dynamic rhytides was notable during the physical examination (Figure 1). Away from the rhytides, there were perpendicular streaks of pigmentation that streamed downwards. Melasma was not discovered during the visible light or Woods light examination. Based on the findings of the physical examination and history, a diagnosis of Phyto photodermatitis to carrot extract-containing sunscreen was made.The patient was instructed to stop using the sunscreen and to stay away from other products that include carrot extract. After stopping the product for eight weeks, the patient noticed a 25% improvement in pigmentation.