What Causes Dane In Vaginal Area During Periods?

hello mam,
i sangeta from meerut,mam my problem is repeated.my history is like i have a 9 yrs old marriege life n at every periods time i had small dane in my v area,doctors treated this.but no one cured it permanently,every test report is normal but repeatedly it occurs,some said herpiece,some hair folicule etc,now i went to homeopathy,pls tell me what should i do,what is the problem with me.