Herniated lumbar discs causing back pain have very limited benefits from heat application during the acute phase, and in some cases, it may even exacerbate pain symptoms. Therefore, it is not recommended to apply heat early on. For the acute phase of a lumbar disc herniation, the first approach is to wear a lumbar support to stabilize and reduce the load on the lumbar spine. The second approach is to sleep on a firm mattress. The third is to undergo relevant imaging studies, such as CT or MRI, to determine the type of herniation. If it is a mild protrusion, physical therapies such as massage, manual therapy, or spinal traction can be considered for treatment.