Pain in the left scalp is a neuropathic headache. There are many causes of neuropathic headache, such as neuropathic headache caused by cold, this situation is mainly for the treatment of cold, after the cold is well, neuropathic headache will also improve, and also pay more attention to keep warm. There are also some patients with neuropathic headache caused by poor sleep, they can take tranquilizer and glutamate to treat insomnia, which can effectively improve neuropathic headache. There are also some patients who have neuropathic headache caused by excessive stress in daily life, long-term staying up late and overworking. They can take Zhengtianwan to treat neuropathic headache, and also vitamin B1 and carbamazepine. If it is particularly painful, oral ibuprofen can be taken to relieve the pain.