Lumbar muscle strain generally does not cause leg pain, but due to the prolonged condition and other complications may cause leg pain. 1. Lumbar muscle strain is a chronic injury disease of lumbar fascia, ligaments, muscles and other soft tissues, mainly due to long-term exertion, weight bearing and other reasons, such as sedentary, standing, carrying heavy objects for a long time, long-term lumbar weight-bearing exercise such as lifting weights and so on. Mainly to lumbar pain, soreness and other symptoms for the main performance. 2. Because lumbar muscle strain is a soft tissue injury, generally does not cause nerve compression or injury, so it will not cause nerve symptoms such as leg pain, leg numbness and other symptoms. 3. If lumbar muscle strain is not cured for a long time, due to muscle damage, ligament laxity and other reasons, it may cause lumbar disc herniation, which may cause leg pain and other neurological symptoms, but it is less common. Lumbar muscle strain usually does not directly cause leg pain, but may cause other complications in the lumbar spine due to the prolongation of the disease, thus causing leg pain. If the above diseases are diagnosed, it is recommended to go to the hospital for consultation and regular treatment under the guidance of the doctor.