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( informal) used to tell somebody to stop trying to do something if they find it too difficult, especially in order to suggest that they are less able than other people: ‘It seems a bit risky to me. Are you sure we should do this?’ ‘Well, if you can’t stand the heat...’. See also: heat, if, stand. Farlex Partner Idioms Dictionary © Farlex 2017.
- Overview
- What is heat intolerance?
- Symptoms
- Complications
- Causes
- Treatments
- Prevention
- Summary
Heat intolerance is an unusual sensitivity to heat. People with heat intolerance may feel hot when others feel comfortable or cold. Heat intolerance causes may include conditions that cause dysautonomia, which affects the autonomic nervous system.
They may also have an unusual response to heat, such as intense sweating or anxiety. Heat intolerance is not a disease, but it can be a symptom of an underlying medical condition.
Heat intolerance is a generic symptom that can refer to a wide variety of responses to heat.
Some people with heat intolerance merely dislike the heat. Others feel uncomfortably hot at temperatures that other people find comfortable.
People may be more susceptible to the effects of heat if they have a health condition such as:
•diabetes mellitus
•obesity
•an infection
The symptoms of heat intolerance can vary from person to person but may include:
•feeling very hot in moderately warm temperatures
•excessive sweating
•not sweating enough in the heat
•exhaustion and fatigue during warm weather
•nausea, vomiting, or dizziness in response to heat
Heat exposure can lead to a range of complications, and people with conditions such as MS, which increase the risk of heat intolerance, may be particularly prone to these complications.
People with heat intolerance should be aware of signs and symptoms that could indicate:
•Heatstroke: This is a medical emergency. Heatstroke can lead to seizures and a loss of consciousness and can quickly become fatal.
•Heat exhaustion: In heat exhaustion, the body loses an excessive amount of water and salt, usually due to sweating. This can lead to dizziness, headache, nausea, and other symptoms.
•Rhabdomyolysis: Prolonged heat exposure and exertion can lead lead to a rapid breakdown, rupture, and death of muscle tissue, known as rhabdomyolysis. This can result in a release of electrolytes and other substances that can, in turn, cause an irregular heart rate, seizures, and kidney damage.
•Heat syncope: A person faints or becomes dizzy due to standing too long, dehydration, and heat exposure.
Those with heat intolerance may have a disorder called dysautonomia that affects their autonomic nervous system.
The autonomic nervous system helps regulate automatic functions of the body, including the body’s response to heat.
Several medical conditions can cause dysautonomia, including:
•diabetes
•alcohol use disorder
•Parkinson’s disease
People with heat intolerance should discuss their symptoms with a doctor, especially if the symptoms appear suddenly or get progressively worse.
To treat heat intolerance, doctors will focus on treating any underlying medical conditions. Treatment will vary widely depending on the underlying condition. For example, people with Graves’ disease may need radioiodine therapy to restore normal thyroid levels.
In many cases, heat intolerance is not fully preventable or treatable. A person with a spinal cord injury may have difficulty in extreme heat no matter what treatment they choose.
People may find that avoiding heat where possible and adopting strategies for safely managing any necessary time in hot conditions will help in the long term. Ways to manage heat intolerance include:
•Avoiding direct sunlight. The sun tends to be at its hottest and brightest between 11 a.m. and 3 p.m.
•Using air conditioning or a fan during the summer months.
Managing medical conditions that cause heat intolerance can help prevent symptoms.
Talk to a doctor about staying safe in the heat and ask whether any medications are available to help the body regulate its temperature.
Some strategies that can reduce the risk of heat intolerance include:
•Maintaining a healthy body weight. Heavier people may have more difficulty cooling their bodies.
•Getting plenty of exercise to remain physically fit. People with good heart and lung health tend to respond better to the heat.
•Limiting or avoiding alcohol and drug use. Excessive alcohol consumption and the abuse of some drugs, such as amphetamines, may increase heat sensitivity.
As many people enjoy outdoor activities, such as swimming and warm-weather festivities, those with heat intolerance may feel frustrated and excluded. However, the right treatment strategy and a few cooling measures may make the heat feel more manageable.
Heat intolerance can provide clues to a person’s overall health. It suggests that either the body may not be able to cool itself down properly, the brain may not be responding correctly to heat, or the heart and lungs may be struggling to work efficiently enough.
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