Mild bulging of the lumbar 4-5 intervertebral disc, which is a relatively mild type of intervertebral disc disease, is due to significant degeneration of the intervertebral disc, such as frequent bending and lifting heavy objects or sedentary lumbar cold, it is easy to have a decrease in the elasticity and toughness of the annulus fibrosus, and cracks will appear, and the nucleus pulposus inside does not protrude, but there are signs of protrusion, which may lead to stimulation of the peripheral nerves or nerve roots around, and the appearance of The symptoms of low back pain, sometimes combined with the lower extremities, especially one side of the lower extremity soreness and uncomfortable feeling. Especially after sitting for a long time, bending over to lift heavy objects, squatting for a long time, or getting cold, the symptoms will be aggravated, so you should keep the lumbar area relaxed and rested, avoid keeping a posture for too long, and pay attention to keeping warm and not getting cold.