(( VaginaPagina ))

sounds like a blister, which will likely get more painful before it gets better. i recommend cool cloths, being very gentle, and not putting too much stuff on it. if it's very painful a numbing medication like benzocaine might help (available in any drugstore/superstore), if the skin is broken and weeping/bleeding use a tiny amount of neosoporin or triple antibiotic ointment on the immediate area only, don't spread it about the vulva. see your health care provider if the pain or sore persists for more than a few days.