I have dark patches on my right cheek, they appeared
Hello and welcome to ask a doctor service. I have reviewed your query and here is my advice.
You seem to have traumatic Anserine Folliculosis which is commonly due to habitual resting of hand against face for long periods leading to prolonged friction and pressure. I suggest you to use a topical retinoid e.g Retino A cream 0.025% cream, nightly apart from avoiding pressure/ friction in that area.
Hope I have answered your query. Let me know if you need any more assistance
I suggest you to use tretinoin 0.025% cream (Retino A 0.025% cream), once daily at night, on the affected skin, 30minutes after washing your face with a gentle cleanser like Cetaphil gentle cleansing lotion. Use it for 3-4 weeks.
Let me know if you need any more assistance