Heat intolerance
Heat intolerance is a symptom reported by people who feel uncomfortable in hot environments. Typically, the person feels uncomfortably hot and sweats excessively.
Compared to heat illnesses like heatstroke, heat intolerance is usually a symptom of endocrine disorders, drugs, or other medical conditions, rather than the result of too much exercise or hot, humid weather.
Symptoms
- Feeling subjectively hot
- Sweating, which may be excessive
In patients with multiple sclerosis (MS), heat intolerance may cause a pseudoexacerbation, which is a temporary worsening of MS-related symptoms.
Diagnosis
Diagnosis is largely made from the patient history, followed by blood tests and other medical tests to determine the underlying cause. In women, hot flashes must be excluded.
Causes
Excess thyroid hormone, which is called thyrotoxicosis, is the most common cause.[1]
Other causes include:
- Amphetamines such as appetite suppressants
- Anticholinergics, which impair sweating
- Caffeine
- Menopause
- Multiple sclerosis
- Hypothalamic tumors[1]
- Methadone treatment
- Dysautonomia[2]
- Sensory defensiveness/Sensory processing disorder
Treatment
Treatment is directed at making the affected person feel more comfortable, and, if possible, resolving the underlying cause of the heat intolerance.
Symptoms can be reduced by staying in a cool environment. Drinking more fluids, especially if the person is sweating excessively, may help.
References
- ↑ 1.0 1.1 Wilkins, Lippincott Williams &. Nursing: Interpreting signs & symptoms. Lippincott Williams & Wilkins; 2007-03-01 . ISBN 9781582556680. p. 306–307.
- ↑ "Autonomic neuropathy" from U.S. National Library of Medicine's MedLine Plus. Accessed 2015-05-20.