Hi there. I do believe that what you are describing is a case of pseudofolliculitis. However to be sure, suggest you take some clear photographs & post them on this site & should you desire discretion, you could pick one of us by name & use our 'ask-a-doctor' feature for privacy. I doubt very much this is any STD
unless viral warts
is a contender but it will have to be confirmed or not on the ground by a dermatologist/venereologist nearest You. The treatment will vary on a case to case basis but topical creams, cryotherapy
, electrocautery may all be employed depending on the condition, doctor's expertise & availability of equipment. Cheers!