The acne also came back after treatment, which Brian says can happen up to 50 percent of the time. "A lot of people think it's a 100 percent success rate and then you're clear forever, and that's not ...

Cystic acne is the largest and most painful form of acne, causing cysts deep beneath the skin. Cystic acne can be caused by hormones, genetics, and lifestyle factors like diet and stress. To treat ...