Patients with throbbing pain on the left side of the head, mainly consider the following reasons: first, if the patient has a history of migraine, the throbbing pain on the left side of the head should be considered a migraine attack. Secondly, if the patient has a cold, bad rest, nervousness or cold or flu that causes neurological headache, the patient will also show a throbbing pain on the left side of the head, and there are obvious triggers. Thirdly, the throbbing pain on the left side of the head may also be caused by cold and fever, because the toxins secreted by infected bacteria or viruses will have a stimulating effect on the fascia of the head, so it will also be manifested as throbbing pain on the left side of the head, which may be accompanied by muscle pain, sore throat, fever and other symptoms.