acne
"I have suffered with acne on my back and chest area for around 14 years. I have been on numerous antibiotics, including trimethoprim (which I had an allergic reaction to). I was on the pill from aged 17-27. Now I am 28 and still suffering severe cystic 'backny'. 

After many tablets, ointments, creams, solutions and treatments, my dermatologist decided to start me on 20mg per day. I will be on 20mg for one month, at which point, I will increase to 40mg every other day. 

Results: I have been on isotretinoin for 10 days. I saw positive results after two days. My chest is clear of all spots. There is one cyst on the mend. My back is showing signs of clearing but very slowly. So far, I am happy. I will post again in a month or so. :)"