There are many side effects that can occur if a patient with a herniated lumbar disc undergoes improper hot compress treatment. Compression of the lumbar nerve by the lumbar disc can cause local irritation of the lumbar nerve and cause nerve edema. Especially for patients who have just suffered from lumbar disc herniation, if hot compress treatment is applied to the lumbar area, the degree of nerve edema will certainly increase, and the symptoms of lumbar pain, leg pain and restricted movement will be significantly aggravated. This will increase the patient’s pain, prolong the healing time and increase the chances of recurrence of the disease, which can also easily become a habitual herniated disc. If you have been suffering from the disease for a long time and usually feel the symptoms of lumbar discomfort, lumbar pain, leg numbness, etc., then if you apply heat for a short time, it may temporarily improve the symptoms. But a long time of hot compresses may still aggravate the symptoms, so it is best to choose physical therapy methods other than hot compresses, which are safer.