What Causes Vaginal Itching With No Abnormal Discharge Or Odor?

been having some itchiness in the vagina for the past 2 months...between which i had a myomectomy and was on antibiotics post-op and the itchiness wasnt there..immediately after i finished my antibiotics dose,it returned..bought over the counter vaginal suppositories-Neo penotran for 7 days within which the itching subsided and eventually dissappeared..a week later,the itching is back..there is no abnormal discharge or odour