See a dermatologist for an accurate diagnosis
Use the prescribed treatment based on the cause
Apply topical corticosteroids if prescribed
Apply topical calcineurin inhibitors if prescribed
Use antifungal cream if the cause is a fungal infection
Use moisturizer regularly
Use sunscreen daily
Avoid harsh soaps and skin irritants
Do not scratch or pick the patches
Treat any underlying eczema or allergy
Check vitamin B12, iron, and other deficiencies if advised
Follow up regularly if the patches spread or do not improve