If a patient has a history of neuropathic headache or migraine, when the patient is exposed to the sun, the sunlight is too strong, which can easily lead to the expansion of the blood vessels in the patient’s head and face, resulting in the stimulation of the patient’s meninges, so it is easy to induce the onset of headache; 2. It is mainly related to the patient’s personal constitution. If patients spend a long time in the sun, it may also lead to heat stroke, which may cause severe headache, nausea, vomiting and other symptoms; 3. If patients spend a long time in the sun, it will lead to a lot of sweating, and the blood will be in a concentrated state after not being able to replenish water in time, which will also lead to dizziness and headache symptoms.