What are the causes of headache after sun exposure?
Jun 24, 2025
Source: Cainiu Health
Dr. Tian Hongbo
Introduction
Under normal circumstances, possible causes of headache after sun exposure may include strong light and high temperature stimulation, eye strain, heatstroke, migraine, hypertension, etc. Symptomatic treatments such as general care and medication may be needed. It is recommended to consume appropriate amounts of cooling beverages, such as mung bean soup or lightly salted water, during hot weather to help alleviate symptoms.
Generally, possible causes of headache after sun exposure may include strong light and high temperature stimulation, eye fatigue, heatstroke, migraine, and hypertension. It is recommended to seek timely medical consultation at a hospital to identify the specific cause and receive targeted treatment. Detailed explanations are as follows:
1. Strong Light and High Temperature Stimulation
Remaining in intense sunlight for a prolonged period, with exposure to bright light and high temperatures, may cause dilation of the head's blood vessels, resulting in headache. Symptoms may include fatigue, thirst, and excessive sweating. It is recommended to quickly move to a cool, shaded area to rest, avoid direct sunlight, and ensure adequate hydration.
2. Eye Fatigue
Staring at bright sunlight for extended periods and resulting eye fatigue can also lead to headaches, possibly accompanied by symptoms such as low energy and dry eyes. It is advised to avoid prolonged exposure to direct sunlight and to use sunglasses to protect the eyes.
3. Heatstroke
Prolonged exposure to high temperatures can impair the body's thermoregulatory center, leading to ineffective heat dissipation and a rapid rise in body temperature. Accompanying symptoms may include high fever, dry and hot skin without sweating, and confusion. It is recommended to promptly move the patient to a cool, well-ventilated area and use cold water to wipe the body for cooling.
4. Migraine
Migraine is a type of functional headache that may be related to genetic, endocrine, and metabolic factors. Sun exposure, as an external stimulus, may trigger or worsen migraine attacks. It typically presents as intermittent throbbing pain on one or both sides of the temples, possibly accompanied by nausea, vomiting, and sensitivity to light. It is recommended to follow medical advice to take medications such as ibuprofen tablets, indomethacin tablets, or nimodipine tablets to relieve symptoms.
5. Hypertension
Hypertension is associated with conditions such as obesity, high sodium and low potassium diet, and kidney disease. Patients with hypertension have increased vascular wall sensitivity to pressure. Elevated body temperature and accelerated blood circulation after sun exposure may stimulate the vessel walls, causing blood pressure fluctuations that may lead to headaches, possibly accompanied by dizziness, palpitations, and chest tightness. It is recommended to take medications such as nifedipine tablets, methyldopa tablets, or captopril sustained-release tablets under a doctor's guidance for treatment.
It is also recommended to consume appropriate amounts of cooling beverages during hot weather, such as mung bean soup or lightly salted water, which may help alleviate symptoms.
