Half a year without coitus, if then coitus caused local pain, may be due to the following reasons: 1, too much tension caused by vaginal spasms, so there will be a feeling of pain, with the relaxation of the mood, the relief of tension, the pain will naturally disappear. 2, local inflammatory reaction of the vagina, coitus due to the vagina has inflammation, local congestion, edema, coitus of the friction will aggravate congestion, edema, so it will cause local pain. The friction will aggravate the congestion and edema, so it will cause local pain, and this patient will often be manifested as an increase in vaginal discharge, and the color may be yellow, or accompanied by the phenomenon of local odor. It is recommended to go to the hospital in time to do the routine examination of the leukorrhea, according to the results and then give the appropriate treatment, will not cause pain in the coitus.