I am 25 years old female and my overall skin has suddenly started darkening specially four head and around the lips. The colour of my face and body do not match. Some very small acne have also started appearing and I can also see dark circles around my eyes to begin with high is not a hereditary. Because of sever acne I had been on isotretinoin almost 1.5 years back and also tried glutathione along with vit c for a month almost 4 months back. Need assistance for medication.