A sexual impulse on the back pain may be lumbar muscle strain, kidney stones, lumbar intervertebral disc herniation. 1. lumbar muscle strain, due to sexual impulse when the penis will be erected, at this time the waist muscles may also be exerted or involved, if the patient has lumbar muscle strain, lumbar muscle exertion will make the lumbar muscle edema aggravated, and the symptoms of lumbar pain. 2. Kidney stones, if the patient suffers from kidney stones, sexual impulses when the waist muscles will be tense and stimulate the kidneys, part of the kidney stone patients combined with hydronephrosis, kidney volume increases, the kidneys will stimulate the posterior wall of the peritoneum and cause low back pain. 3. Lumbar disc herniation, sexual impulse lumbar spine will be active, if the patient suffers from lumbar disc herniation, then in the sexual impulse may lead to herniated discs compression of the nerves, the symptoms of lumbar pain. There are many possible reasons for back pain when you have sexual impulses, so it is recommended that you seek medical attention in a timely manner to clarify the cause of the problem and treat it under the guidance of your doctor.