Hello,
From the symptoms and pictures,it looks like tinea versicolor. Tinea versicolor is caused by a fungus that lives in the skin of almost all adults. Factors that can cause the fungus to become more visible include high humidity and immune or hormone abnormalities.Treatment involves topical and oral antifungal medicines.
Most cases of fungal infections respond to over-the-counter products, which contain any of several basic ingredients: miconazole, tolnaftate, terbinafine,ketaconazole and clotrimazole.You can consult a pharmacist and get any cream or lotion containing these ingredients. Some of them are Lamisil, Monistat derm, Mycelex, and Nizoral.
If still the symptoms do not improve then pls get a clinical examination done by a dermatologist.
I sincerely hope that helps.Take care and pls do keep me posted on how you are doing or if you have any additional doubts.Kind regards.
Looks like Schamberg's disease, I was just diagnosed a few days ago. You will only know for sure with a tissue biopsy done by a dermatologist or family doctor on request. Unfortuatley you can't find much information about it out there. Let me know what you find out.