When couples have back pain after intercourse, generally consider the possibility of pelvic inflammatory disease, cervicitis and lumbar muscle strain. Normally, when there is acute and chronic pelvic inflammatory disease, there will be slight lower abdominal distension and pain, soreness and swelling at the bottom of the waist, which are not very obvious, but after intercourse aggravates sexual organ congestion, the symptoms of lumbar pain will become powerful. When there is inflammation and erosion of the cervix, it will be stimulated during sexual relations, which will cause pain, and a routine gynecological examination with a dilator will be able to find out. The sexual life is not controlled, too frequent can easily cause kidney deficiency, resulting in back pain. Pay attention to rest, strengthen nutrition, have a moderate sex life, eat more high-protein food and kidney food, appropriate physical exercise.