A 29-year-old woman had suffered from exfoliative dermatitis and occasional nettlerash for two years. Prior to that, she had had acne since she was 20. The acne had got better when her GP put her on 100 mg/day of doxycycline, but her dermatitis started soon after that. I told her that it was likely that her current problems were a reaction to the antibiotic she was taking and that possibly she had undiagnosed ovarian cysts, and that she should have an ultrasound. She did so, and my hunch proved to be correct.
She stopped taking the doxycycline and took EAC drops daily. After one month, she had no allergic skin problems and now, 18 months later, after taking nothing for 10 months, she has no acne either. Another ultrasound showed that her ovarian cysts have disappeared.