I Am Having Problems With My Underarms And Pubic Area

hi im an indian , im having problems with my underarms and pubic area, its really dark over there, very itchy and swelling kind like pimples . im very embarrassed to tell anyone. and i do use razors to remove hair and when i recently used it, it started getting worse and very dark and itchy.if you can tell me which medicine or ointment should i use, it would be a really big help. please help!