The treatment of left intercostal neuralgia depends on the cause: 1. If the left intercostal neuralgia is simply intercostal neuralgia, manifested as a burning sensation of the skin distributed between 1-2 intercostal spaces, or an electric shock-like sensation, or a painful sensation. The patient’s symptoms can be relieved after treatment with anti-epileptic drugs such as gabapentin and pregabalin taken orally.2. If the patient’s left intercostal neuralgia is caused by herpetic neuralgia due to herpes zoster on the left side, in the acute phase the main antiviral is given, such as ganciclovir or anti-inflammatory dexamethasone, while the nerve-nourishing rat nerve growth factor and other drugs are given for early treatment. 3. If the left intercostal neuralgia is caused by compression of a mass in the chest wall, the pain can be relieved by removing the mass from the chest wall.