Hi, I can understand your concern for the problem blotchy skin. After reading yur query I can make a tentative diagnosis of Lichen planus pigmentosus or Lichen amyloidosis. In both the conditions there is overactivity of melanocytes at epidermal and dermal region. Melanocytes are the color producing cells of skin which causes superficial and deep pigmentation which may appear as blotchy pigmentation in ichen planus pigmentosus or Lichen amyloidosis. The most important part in treatment is by sun protection by all measures. Eat healthy diet containing lot of Vitamin A and Vitamin C. Do not try applying over the counter products as these can further aggravate the situation. Protect yourself form direct sunlight. Use a good sunscreen on exposed area for 2-3 times and drink plenty of liquids everyday. Lightening agents such as Kojic acid or azelaic acid or Hydroquinone cream application which you can use under dermatological guidance. All the best.