Pain during penetration may be associated with a range of factors.. This is often the result of not enough foreplay. Insufficient lubrication is also commonly caused by a drop in estrogen levels after menopause, after childbirth or during breast-feeding. Certain medications are known to inhibit desire or arousal, which can decrease lubrication and make sex painful. These include antidepressants, high blood pressure medications, sedatives, antihistamines and certain birth control pills. This includes injury or irritation from an accident, pelvic surgery, female circumcision or a cut made during childbirth to enlarge the birth canal (episiotomy). An infection in your genital area or urinary tract can cause painful intercourse. Eczema or other skin problems in your genital area also can be the problem...Involuntary spasms of the muscles of the vaginal wall (vaginismus) can make attempts at penetration...consult gynecologist they will help you further