Diseases causing heat issues often involve conditions that impair the body's temperature regulation or increase its workload, like heart disease, kidney disease, diabetes, lung disease, neurological disorders (MS, spinal cord injury), thyroid issues (hyperthyroidism), infections, and autoimmune diseases (lupus). Heat exposure can worsen these conditions, leading to heat exhaustion, heatstroke, or complications like heart attack, stroke, or kidney failure, as the body struggles to cool down.
Heat-related illnesses include heat stroke, heat exhaustion, heat cramps and heat rash. Heat stroke and heat exhaustion involve an abnormally high body temperature (hyperthermia) and need immediate treatment.
Heat-related illnesses include heat stroke, heat exhaustion, rhabdomyolysis, heat syncope, heat cramps, and heat rash.
Autoimmune conditions, such as lupus, can be aggravated by exposure to direct sunlight and UV rays, causing a sudden and severe onset of redness, heat, pain, or swelling.
Early lupus warning signs often mimic other illnesses, but key indicators include extreme fatigue, fever, joint pain/swelling, skin rashes (especially a butterfly-shaped rash on the face), hair loss, and sensitivity to sunlight, alongside potential issues like headaches, mouth sores, and fingers/toes turning white or blue in the cold (Raynaud's). These symptoms can appear suddenly or slowly and come and go in flares.
This can be due to the condition itself or any medicine you may take to manage it:
Feeling unusually hot or overheated may result from an underlying medical condition. These can include hyperthyroidism, menopause, or an infection or illness. However, some bodies may just run hotter than others. If you feel uncomfortably hot or overheated, contact your doctor for further advice.
Heat-related illness signs, symptoms and treatment
The most serious heat-related illness is heat stroke. Heat stroke can cause death or permanent disability if emergency treatment is not provided.
Several factors can raise body temperature in women, including dehydration, prolonged sun exposure, overexertion during workouts, hormonal changes like hot flashes during menopause, and consuming caffeine or alcohol. Certain conditions affecting thyroid function can also impact your body's natural cooling ability.
Possible heat exhaustion symptoms include:
Heat stroke, the most severe form of heat illness, occurs when the body's heat-regulating system is overwhelmed by excessive heat. It is a life-threatening emergency and requires immediate medical attention.
Viruses that can cause hyperpyrexia include enterovirus infection, roseola, rubeola, and malaria. Hyperpyrexia is associated with a body temperature of more than 106.7°F or 41.5°C. Typically, treatment for hyperpyrexia focusses on the underlying disease, if one exists.
The hypothalamus helps keep the body's internal functions in balance. It helps regulate: Appetite and weight. Body temperature.
Again, underlying conditions may cause a person to feel hot and tired, including hyperthyroidism, menopause, diabetes, anhidrosis, and anxiety. Again, underlying conditions may cause a person to feel hot and tired, including hyperthyroidism, menopause, diabetes, anhidrosis, and anxiety.
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Poikilothermia refers to the inability to internally regulate core body temperature. Clinically, poikilothermia can manifest with hypothermia (core temperature less than 35°C/95°F) or hyperthermia (core temperature > 37.8°C/100°F).
Early signs include thirst and muscle cramps. Heat exhaustion may include: cool, moist, pale skin; headache; dizziness; weakness or exhaustion; nausea.
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Vitamin B12 deficiency is common. It is known to cause a wide spectrum of neurological syndromes, including autonomic dysfunction. Three cases are discussed here in which drenching night sweats were thought to be caused by vitamin B12 deficiency.
You may develop this symptom if you have an anxiety disorder, if you're in menopause, or if you have thyrotoxicosis (when your thyroid gland makes too much thyroid hormone) from any condition, like hyperthyroidism. Other issues and conditions can make you more likely to have heat intolerance.
Non-infectious medical conditions that can increase body temperature include autoimmune diseases, inflammatory bowel diseases – e.g. Crohn's disease, malignancies, polyarteritis nodosa, sarcoid, and an over-active thyroid gland/hyperthyroidism.
Damage to the ANS can cause heat or cold intolerance, where you're very sensitive to heat or cold. For some people with lupus, heat intolerance may cause overheating or hot flashes.