I had a very bad case of acne in year 2010. I used isotretinoin 20mg twice a day for two months . During the usage my acne flared up real bad . But it was cured in a month the 2nd month few acne scars were there which cleared up in the 2nd month . I have mild acne case again in year 2016. I have started the isotretinoin course again . Will my acne flare up this time too ? And how long would it take to get cured ?.