“Acne After Botox”

I have been getting regular botox for almost a year now. I love the result on the deep frown lines, however was hoping for a relaxing of the muscles over time, I have unfortunately not experienced any and continue to return every three months. One problem I have had since beginning treatment is extremely bad nodular acne only on my forhead, generally in the areas treated! I have talked to my dr, and he swears there is no relation, but I never had it before, and it is absolutely always a problem now. I am 39 years old and I constantly have cystic acne on my forhead only now.