A spot pain on the left side of the head may be related to head trauma, or it may be caused by migraine, intracranial tumor and so on. 1. Head trauma: If the left side of the head is accidentally hit or struck by an external force, resulting in localized trauma, it may cause a spot pain on the left side of the head, and may be accompanied by redness, swelling, bruising and other symptoms. 2. Migraine: When migraine attacks, patients may experience paroxysmal, throbbing pain on one or both sides of the head, which may show a spot pain on the left side of the head, and may be accompanied by dizziness, nausea, photophobia, photophobia and other symptoms. 3. Intracranial tumor: If there is an intracranial tumor on the left side of the head, with the gradual increase of the tumor volume, it is easy to cause pressure on the local tissues, which may cause a point pain on the left side of the head, and may be accompanied by nausea, vomiting and other symptoms. A spot pain on the left side of the head may also be caused by other reasons, if the symptoms continue to be unable to relieve or significantly aggravated, you should consult a doctor as soon as possible, after clarifying the causes, and then be guided by the doctor for treatment.