what can i use to cure pseudofolliculitis barbae?

Many male relatives in my extended family have suffered from this condition in which the beard hairs grow back into/under the skin and become painfully infected spots. You don't mention which medications you've tried so far. You might want to talk with a dermatologist about trying a course of antibiotics by mouth, in conjunction with a topical antibiotic applied directly on the skin. When things calm down, then you might want to try a using with a depilatory cream, instead of a razor.

(One brand is called "Magic Shave") If all else fails, your could try growing out a beard, so that the hairs are no longer short/sharp enough to grow back into the skin. My 2 cousins played football in HS and their Dr. thought that maybe wearing a helmet so much of the time might have contributed to the problem in some way. Curiously, when they graduated and stopped playing football so often, the condition did improve, somewhat.

ok and what is this