What causes headaches during the hot summer days?

Generally, headaches caused by hot summer weather may be due to dehydration, heat stress response, heatstroke, hypertension, insufficient cerebral blood supply, and other factors. Symptomatic treatment through general care or medication is usually needed. If discomfort occurs, seek medical attention promptly to avoid delayed treatment. Detailed explanations are as follows:

1. Dehydration

In summer, high temperatures cause the body to dissipate heat through sweating. Failure to replenish fluids promptly may lead to dehydration. During dehydration, blood viscosity increases, cerebral oxygen supply decreases, and cerebral blood vessels dilate, stimulating pain nerves and causing headaches. Symptoms may include thirst, reduced urine output with dark color, fatigue, and others. It is recommended to replenish fluids promptly, and drink cool beverages such as lightly salted water or coconut water.

2. Heat Stress Response

In a high-temperature environment, the body initiates a heat stress response to maintain thermal balance. This response accelerates heart rate, elevates blood pressure, and increases cerebral blood flow, causing vascular dilation and inflammatory reactions, which stimulate pain nerves and result in headaches. Symptoms may include palpitations, nausea, and flushed skin. It is recommended to use cooling devices such as air conditioners and fans, and maintain good indoor ventilation and coolness.

3. Heatstroke

Remaining in a high-temperature environment for a prolonged period may impair the body's thermoregulatory center, leading to heatstroke. In the early stages of heatstroke, common symptoms include headache, dizziness, nausea, and other discomforts. It may also be accompanied by confusion and dry, hot skin. It is recommended to promptly move the patient to a cool, well-ventilated area and use medications such as Huoxiang Zhengqi Water, Suhe Xiang Pills, and Shidi Shui according to medical advice.

4. Hypertension

In a high-temperature environment, the body accelerates blood circulation to dissipate heat, causing excessive vasoconstriction and elevated blood pressure. Increased cerebral blood flow can cause headaches, which may be accompanied by palpitations, chest tightness, blurred vision, and other symptoms. Hypertensive patients are advised to use medications such as Nifedipine tablets, Methyldopa tablets, and Captopril sustained-release tablets according to medical advice to alleviate symptoms.

5. Insufficient Cerebral Blood Supply

During extreme heat, peripheral skin blood vessels dilate, causing insufficient blood supply to the vessels, and a temporary reduction in cerebral blood flow, which may trigger headaches. Symptoms may include dizziness, fatigue, and memory decline. It is recommended to use medications such as Aspirin enteric-coated tablets, Clopidogrel hydrogen sulfate tablets, and Rosuvastatin calcium tablets under a doctor's guidance for treatment.

Daily recommendations include taking sun protection measures, such as using an umbrella or wearing a sun hat when going outdoors, to avoid direct head exposure to sunlight, which helps reduce the occurrence of headaches.