I have had acne all of my teenage years. I am now 23, however it cleared up slightly around 18 and returned severely around 20. Some people dont realise the medical problems that can cause acne. I recently found out that I had an ovarian tumour and I have had the ovary removed. My skin has completley cleared up. The hormone levels the tumor was creating (androgen, male hormone testestrone) was causing my acne. For females with adult acne it is usually caused by an excess of androgen production, pcos or ovarian cysts, tumors or cancer. I would get ultrasounds and hormone level tests if I knew this before. There are hormone treatments which can lower these levels of androgens, to a normal female level, and yes clear your acne up. Some dermos dont seem to get this!

Accutane, expensive creams treatments etc will do nothing to improve adult female acne.