There are many possibilities. There are some conditions that affect the face like lichen planus pigmentosus, Rheils melanosis, seborrheic melanosis, pigmented contact dermatitis, certain drug reactions(if you are on any medicines) or simple tanning due to sun exposure. Treatment depends on what your diagnosis is. Try avoiding sunlight. Use a high SPF sunscreen 50+ and PA +++ or higher.. Sunscreens should be used at 8am 11am 2pm daily whether or not you think u are exposed to sunlight. Visit a dermatologist to get accurately diagnosed. Some conditions will require a biopsy to prove as they are rare. Others can be diagnosed clinically. Warm regards. Dr. Rajdeep Mysore. Chirag Hospital Bangalore
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