You are having acne vulgaris and facial melanosis
Acne is exacerbated by stress,oily food, ghee, milk,heavy exercise, sleeplessness.. etc.
Take antibiotics like azithromycine or doxycycline for long time.
Apply clindamycine gel daily at night.
Avoid all factors suggested as above.Hypermelanosis
may be reduced by protecting the skin from sun rays.
Apply sun screen gel during day time and apply kojic acid and vitamin C containing cream at night.
Cleanse the face with salicylic acid
containg face wash.
Have healthy food.
Take proper sleep.
You will be benefitted., still, you consult dermatologist
Dr. Ilyas Patel MD