Can heatstroke cause fever?
May 15, 2022
Source: Cainiu Health
Dr. He Haochen
Introduction
Heatstroke can cause fever. It commonly occurs in environments with excessively high ambient temperatures—typically above 35°C—and high humidity coupled with poor ventilation. Additionally, heatstroke may develop when individuals perform physical labor—especially strenuous activity—for an extended period under direct sunlight without adequate sun protection or cooling measures. With prompt treatment, symptoms usually resolve within several hours.
Summer brings hot weather, and outdoor activities during this season significantly increase the risk of heatstroke. Heatstroke can trigger a range of symptoms that seriously endanger health. Does heatstroke cause fever?
Does heatstroke cause fever?
Yes, heatstroke can cause fever. It commonly occurs when ambient temperature is excessively high—typically above 35°C—and humidity is elevated with poor ventilation. Additionally, engaging in physical labor—especially strenuous activity—for prolonged periods under direct sunlight without adequate sun protection or cooling measures may also precipitate heatstroke. High temperatures impair the function of the hypothalamic thermoregulatory center, disrupting the body’s heat balance. This leads to excessive heat accumulation and reduced heat dissipation, resulting in a net increase in body temperature (i.e., fever). Individuals at higher risk include the elderly, those who are physically frail or obese, heavy alcohol consumers, and those suffering from dehydration. Other high-risk groups include patients with hyperthyroidism, diabetes, cardiovascular disease, extensive skin damage, anhidrosis (absent or diminished sweating), or those taking anticholinergic medications such as atropine—which inhibit sweat gland secretion.
In mild cases of heatstroke, body temperature rises markedly—often exceeding 38°C—accompanied by profuse sweating, hot and flushed skin. In more severe cases, tachycardia and hypotension may develop. With prompt intervention, symptoms typically resolve within several hours.
In severe heatstroke—particularly classic (non-exertional) heatstroke—body temperature often exceeds 41°C. Patients present with dry, anhidrotic skin, severe dizziness or headache, and potentially altered mental status. In critical cases, hypotension may progress to shock, and complications such as acute heart failure, acute pulmonary edema, or hepatic and renal failure may occur—requiring immediate emergency treatment. We hope this article has been helpful. Wishing you a joyful life and good health!
