Without examination, confirmation of a diagnosis is tough but it can be due to friction rub, folliculitis or cyst
. They are less likely to be herpes blisters which appear as painful blisters on the genital area. The blisters break, leaving tender ulcers (sores) that may take two to four weeks to heal the first time they occur.
Apply warm compresses, Neosporin ointment and calamine lotion and avoid messing with it.