i m 17 year old girl,i m suffering from pimples from past 6 to 7 years,i had pimples,comedons,black marks on whole body specially chest ,back,new pimples are developed again & again.when i was took any treatment for pimples,my face was clean but after the end of treatment again same problem start,i m engineer student stress level is also high,cnt cmplete 6hrs sleep in hostel.