If the headache after sun exposure is due to physiological factors, no treatment is required. If it is caused by migraine, heatstroke and other diseases, general measures, medication, other treatments and surgery should be taken according to the cause. 1. Physiological phenomenon: If you stay indoors for a long time and then suddenly go out to be exposed to the sun, it is easy to cause vasodilatation and then headache, which is considered to be a normal physiological phenomenon and can be relieved by yourself in a short period of time without treatment. 2. Migraine: This disease is often caused by strong light stimulation leading to headache, nausea, vomiting and other symptoms. For mild to moderate headache, we need to follow the medical advice to apply ibuprofen, aspirin and other non-steroidal anti-inflammatory drugs. For moderate to severe headaches, ergot alkaloids such as ergotamine tartrate and dihydroergotamine are prescribed. Triptans such as sumatriptan and zolmitriptan may also be applied. Patients can also take other treatment modalities such as transcutaneous electrical stimulation therapy, biofeedback, and relaxation therapy. 3. Heatstroke: Typical symptoms include dizziness, headache, weakness of limbs, thirst and so on. At this time, it is necessary to promptly carry out head cooling, the use of cold water immersion or reduce the temperature of the surrounding environment. If physical cooling is ineffective, saline peritoneal lavage is required. For those who have convulsions, doctors will use diazepam, clonazepam and other drugs to relieve the symptoms; if accompanied by increased intracranial pressure, the need to apply mannitol to reduce intracranial pressure. There are many causes of headaches after sun exposure, and patients need to go to the hospital and actively treat the original disease. Drugs should be used in accordance with medical advice.