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Published on: 4/7/2025

How Long Can the Symptoms of Heat Exhaustion Last?

Heat exhaustion symptoms usually improve within a few hours once you cool down and rehydrate, but in some cases, they might last for up to a day or two.

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Explanation

Heat exhaustion happens when your body overheats and has too much stress from hot conditions.When you get out of the heat, start cooling down, and drink plenty of fluids, most of the uncomfortable symptoms like heavy sweating, weakness, and headache often start to get better within a few hours. However, how long these symptoms last can depend on how severe your condition is, how quickly you begin treatment, and whether you have any other health issues. If you take action quickly by finding a cool place, resting, and hydrating, you might feel better fast. On the other hand, if the heat exposure was severe or if treatment takes a little longer, the symptoms could last as long as a day or two. If your symptoms continue or worsen, it's important to seek medical help. Taking care early on helps your body recover more quickly and can prevent more serious heat-related problems.

(References)

  • Glazer JL. Management of heatstroke and heat exhaustion. Am Fam Physician. 2005 Jun 1;71(11):2133-40. PMID: 15952443.

  • Kenny GP, Wilson TE, Flouris AD, Fujii N. Heat exhaustion. Handb Clin Neurol. 2018;157:505-529. doi: 10.1016/B978-0-444-64074-1.00031-8. PMID: 30459023.

  • Savioli G, Zanza C, Longhitano Y, Nardone A, Varesi A, Ceresa IF, Manetti AC, Volonnino G, Maiese A, La Russa R. Heat-Related Illness in Emergency and Critical Care: Recommendations for Recognition and Management with Medico-Legal Considerations. Biomedicines. 2022 Oct 12;10(10):2542. doi: 10.3390/biomedicines10102542. PMID: 36289804; PMCID: PMC9599879.

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