Heat intolerance may be caused by:
Heat intolerance is a feeling of being overheated when the temperature around you rises. It can often cause heavy sweating.
Heat intolerance usually comes on slowly and lasts for a long time, but it may also occur quickly and be a serious illness.
Exposure to extreme heat and sun can cause heat emergencies or illnesses. You can prevent heat illnesses by:
- Drinking plenty of fluids
- Keeping inside room temperatures at a comfortable level
- Limiting how much time you spend outdoors in hot, humid weather
What to Expect at Your Office Visit
Your provider will take a medical history and perform a physical examination.
Your provider may ask you questions like these:
- When do your symptoms occur?
- Have you had heat intolerance before?
- Is it worse when you exercise?
- Do you have vision changes?
- Are you dizzy or fainting?
- Do you have sweating or flushing?
- Do you have numbness or weakness?
- Is your heart beating fast, or do you have a rapid pulse?
Tests that may be performed include:
When to Contact a Medical Professional
Call your health care provider if you have unexplained heat intolerance.
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Kim M, Ladenson PW. Thyroid. In: Goldman L, Schafer AI, eds. Goldman-Cecil Medicine. 25th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 226.
Sawka MN, O'Connor FG. Disorders due to heat and cold. In: Goldman L, Schafer AI, eds. Goldman-Cecil Medicine. 25th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 109.