Black mark could be melanosis. Regarding acne, it can be treated easily with facewash, tablets and creams. Some people have more oilyness on the face which results in breakouts. After completing treatment for controlling the active breakouts, tablets can be stopped and creams need to be continued to prevent recurrence. Diet and lifestyle modifications are also important. Please don't do any self treatment such as over the counter Steroid creams. Don't burst the pimples with your fingers as it can result in ugly scars. Please send your photos through private chat option for detailed prescription and diet advice.

Greetings. Pimples may often leave spots especially if not treated or if we burst pimples or pick them. You'll need skin lightening creams for a specified duration to reduce the marks, and this could also be dealt with chemical peeling. Also you must use a sunscreen to prevent darkening of the spots. For scars, creams may not work n you may need procedures like microneedling, microneedling rf, fractional lasers, prp or subscision or a combination of these. See a dermatologist near you and discuss the same with him. Hope this helps. (Caution: do not be lured by unrealistic claims and offers made by quacks who claim to be specialists in trichology n cosmetic sciences or even saloons. Make sure you are treated by a qualified dermatologist). Warm regards, Dr Govind Suresh Mittal, Bengaluru.