Spasmodic pain in the lower back can be caused by cold, herniated lumbar disc, and lumbar dorsal myofasciitis. 1. Exposure to cold: when wearing too little clothing or living in a cold environment, the muscles in the lumbar region are abnormally spasmodic, which can lead to the symptoms of spasmodic pain in the lumbar region. 2. Herniated lumbar discs: when suffering from herniated lumbar discs, the abnormally protruding discs may compress the local nerves or blood vessels, resulting in abnormal spasms or constriction of the blood vessels, which will cause the symptoms of spasmodic pain in the lower back. 3. Lumbar dorsal myofasciitis: If prolonged strenuous exercise or improper exercise posture, so that the lumbar back muscles are in a state of tension for a long time, the fascial ligaments continue to pull, resulting in localized inflammation, the symptoms of lumbar spasmodic pain will occur. Because of the causes of lumbar spasmodic pain more causes, it is recommended to go to the hospital in time for examination and diagnosis, as soon as possible for targeted treatment.