It can be that (genital herpes) or the way you shave. I read it once it can be irritation, or ingrown hairs. Once they get shaved off, some hairs start growing under the skin and create irritation and bumps. So be careful the way you shave. It said to shave the way the hair grows. So if it grows down, shave downwards. Dont shave against it. Thats what makes it grow under the skin and irritate it and it can be from razor burn. I also shave everything, legs, arms etc. So I read on it, hope it helps!