Hi, You are having facial melanosis and acne vulgaris. Facial melanosis may be due to pollution, cosmetics, vitamin and mineral deficiencies, anaemia,internal diseases,stress,excessive sun exposure and so on.. Acne vulgaris is due to tendency ... and you have oily skin.. it may be acneform eruptions...acneform eruptions may be due to stress, anxiety, oily food,milk intake, ghee,excessive sun exposure, drug like steroid, INH,iodine in cough syrup.. You take vitamin C, nicotinic acid and glutathion containg tablets for melanosis. Kojic acid and vitamin C containing cream may be applied at night on melanotic patches. For acne, you take antibiotics like azithromycine or minocycline. And you apply clindamycine gel on acne lesions. I do not advise to apply sun screen at this stage .. After control of acne lesions ,you may apply sunscreen. No sunscreen can cure acne. It only protects the skin from sun rays , which cause melanosis. You avoid tesion , worries, foods which aggravate acne lesions. Take healthy food and proper sleep. I hope you may got proper advice.. Regards.. Dr. Ilyas patel MD