Prostatitis may cause thigh root pain. But there are many reasons for thigh pain, not necessarily caused by prostatitis, but also due to rheumatic diseases, lumbar spine disease. 1. Prostatitis: The clinical manifestations of prostatitis are mainly urinary discomfort and pain in the perineum and lower abdomen, which may involve pain in the thighs and pelvic-sacral region. If chronic bacterial prostatitis, it will also show complications such as arthritis, neuritis, etc. He will also cause thigh root pain. 2. Rheumatic diseases: such as rheumatoid leg joints, wind, etc., will lead to limb muscle weakness, accompanied by thigh soreness and swelling symptoms, movement of the whole thigh can not be normal activities. 3. Lumbar spine disease: If the patient has lumbar intervertebral disc herniation, it will stimulate the local nerves, causing reflex pain in the area innervated by the local nerves, triggering thigh root pain. Especially in the lumbar activities, the symptoms are more obvious. If the symptoms of thigh root pain occur, it is recommended to go to the hospital to find out the specific causes of thigh root pain, do not self-medication, should be under the guidance of the doctor symptomatic treatment.