Sun a headache nausea consider and primary headache, high blood pressure, heat stroke and so on. 1. Primary headache: prolonged sun exposure may induce primary headache attacks, including migraine, tension headache, manifested as frontotemporal throbbing headache or head tightness. 2. Increased blood pressure: prolonged exposure to the sun may lead to increased blood pressure, cerebral vasodilatation, patients may have headache attacks, accompanied by nausea and other symptoms. 3. Heatstroke: prolonged exposure to the sun is likely to cause dysfunction of the thermoregulatory center, leading to heatstroke, the patient will have a headache, nausea, vomiting, sweating, general weakness and other symptoms. Appearance of the sun on the nausea and headache patients need to be transferred to the shade in a timely manner, after rest or rehydration after the symptoms are still not relieved it is recommended to consult a doctor in a timely manner, to clarify the cause of the treatment under the guidance of the doctor.