Feeling overheated and sweating excessively can be uncomfortable, especially when you don't know what's causing it. Sometimes the reason is harmless, but constant heat intolerance can also be linked to certain conditions or medications.
Feeling constantly hot, even when others around you feel perfectly comfortable, isn't just a summer issue. Overheating and excessive sweating can be signals your body sends, and their causes range from completely harmless to those requiring medical attention. Health portal presents an overview of seven possible reasons why you might always feel hot.
Insulin is a hormone that helps the body use glucose from the blood as an energy source. In diabetes, the body either doesn't produce enough insulin or doesn't use it properly, leading to high blood sugar levels. When blood sugar remains elevated over time, damage to blood vessels and nerves can occur, which in some people can affect sweating and body temperature regulation. This makes diabetics often more susceptible to heat.
Hyperthyroidism, or an overactive thyroid, is a condition where the thyroid produces more hormones than the body needs. The most common trigger is Graves' disease, but thyroid nodules, inflammation, and excessive iodine intake are also possible. One of the signs can be poor heat tolerance. You may also experience excessive sweating, rapid pulse, fatigue, muscle weakness, and hand tremors.
During pregnancy, it's quite possible to feel hot more often. The body changes in many ways: blood volume increases, metabolism adjusts, and as pregnancy progresses, heat production rises. Therefore, expectant mothers may be more susceptible to high temperatures and often feel warmer than usual.
Hot flashes are one of the most well-known symptoms of menopause and perimenopause. They are sudden feelings of warmth that typically spread to the face, neck, and chest, often accompanied by sweating. They occur due to hormonal changes that affect body temperature regulation. They can happen both day and night. When they occur at night, they're referred to as night sweats, which can significantly disrupt sleep for some women.
Although it may sound unusual, the problem can also be too little sweating. Anhidrosis is a condition where an individual doesn't produce enough sweat or can't sweat at all. Sweating is a key mechanism for cooling the body, so its absence can reduce heat tolerance. Causes vary: from diseases and nerve damage, to problems with sweat glands, to certain medications.
If the feeling of heat is accompanied by an elevated body temperature, the cause may be a fever. It usually occurs as a reaction to an infection, but it can have other causes. It's especially important to pay attention to a high or prolonged fever, as well as signs like difficulty breathing, mental confusion, stiff neck, severe headaches, persistent vomiting, rash, or extreme weakness. In such situations, seek medical help.
Certain medications can affect the body's ability to regulate temperature or sweat. This includes some antidepressants, antipsychotics, blood pressure medications, diuretics, anticholinergics, and others. This can be particularly important during summer heat and heatwaves. If you think the feeling of heat is related to your therapy, don't stop or change it on your own; consult your doctor or pharmacist instead.
If you often feel hot, the way to reduce discomfort depends primarily on the cause. For some people, simple changes to daily routines can be helpful. On hot days, wear light, breathable clothing, drink plenty of fluids, and stay in air-conditioned spaces whenever possible. It's better to do more strenuous outdoor activities in the morning or evening when temperatures are lower.
People with hot flashes can try to avoid triggers like alcohol, caffeine, and highly spicy foods. If night sweats bother you, try keeping your bedroom comfortably cool and using lighter bedding. For quick cooling, a fan or air conditioning, a cold drink, and a cool compress on the neck, forehead, or wrists can help. Taking a lukewarm or pleasantly cool shower can also be beneficial.
Some people naturally tolerate heat less well or sweat more than others. However, if you notice a new or significant change, you're constantly hot without an obvious reason, or symptoms start interfering with daily life and sleep, it's advisable to consult a doctor. Seek emergency medical help if, along with extreme overheating, you experience confusion, loss of consciousness, difficulty breathing, chest pain, a very rapid pulse, severe weakness, or a very high body temperature. These signs may indicate a serious heat-related condition and require immediate treatment.
