If you frequently experience the sensation of feeling hot, even in the absence of external heat, it is important to know that you are not alone. There are various causes for this sensation, and some of them may be more serious than others. In this article, we will delve into the common causes of feeling hot all the time, specifically focusing on hypothyroidism, diabetes, pregnancy, menopause, fever, anhidrosis, medications, and other factors that may contribute to this feeling. Additionally, we will explore ways to alleviate the discomfort and determine when it is necessary to consult with a healthcare professional.

Hypothyroidism and Feeling Hot

One possible cause of feeling hot all the time is hypothyroidism, a condition in which the thyroid gland doesn’t produce enough thyroid hormone. This can lead to a variety of symptoms, including fatigue, weight gain, dry skin, and feeling cold or hot all the time.

According to the American Thyroid Association, an estimated 20 million Americans have some form of thyroid disease, and up to 60% of them are unaware of their condition. Women are also five to eight times more likely than men to develop thyroid problems.

If you suspect that you may have hypothyroidism, it’s important to see a healthcare provider for diagnosis and treatment. Blood tests can confirm whether your thyroid hormone levels are too low, and medication can help regulate them.

Diabetes and Feeling Hot

Another potential cause of feeling hot or flushed is diabetes, a chronic condition in which the body doesn’t properly process glucose (sugar) from food. High blood sugar levels can cause a variety of symptoms, including excessive thirst, frequent urination, and feeling hot or sweating.

According to the Centers for Disease Control and Prevention (CDC), more than 34 million Americans have diabetes, and about 88 million have prediabetes. Diabetes is also more common among certain groups, including African Americans, Hispanic/Latino Americans, and Native Americans.

If you have diabetes, it’s important to work with your healthcare provider to manage your blood sugar levels through diet, exercise, medication, and other treatments. This can help prevent or minimize symptoms like feeling hot all the time.

Pregnancy, Menopause, and Feeling Hot

Women may also experience frequent feelings of heat due to hormonal changes during pregnancy or menopause. During pregnancy, increased blood flow and metabolic activity can cause higher body temperature and feelings of heat. During menopause, decreased levels of estrogen can lead to hot flashes, sweating, and feeling hot.

According to the North American Menopause Society, an estimated 6,000 women worldwide reach menopause every day, and this number is expected to increase as the population ages. Women who are pregnant or experiencing menopause-related symptoms can talk to their healthcare provider about ways to manage their symptoms, such as staying cool, dressing in layers, and avoiding triggers like spicy foods or alcohol.

Pregnancy, Menopause, and Feeling Hot

Fever and Feeling Hot

Of course, one of the most common and obvious causes of feeling hot is having a fever. A fever is a symptom of many illnesses, including infections, autoimmune disorders, and certain cancers. It occurs when the body’s internal temperature rises in response to an infection or inflammation.

According to the World Health Organization (WHO), fever is a common symptom in many infectious diseases, including COVID-19, influenza, and Ebola. If you have a fever, it’s important to monitor your temperature, drink plenty of fluids, and rest. In some cases, medications like acetaminophen or ibuprofen can help reduce fever and relieve other symptoms.

Fever and Feeling Hot

Anhidrosis and Feeling Hot

On the opposite end of the spectrum, some people may feel hot or flushed due to anhidrosis, or the inability to sweat. Sweating is the body’s natural way of regulating temperature, so if you can’t sweat, your body can’t cool down effectively, leading to feelings of heat or discomfort.

According to the National Organization for Rare Disorders (NORD), anhidrosis can be caused by a variety of factors, including certain medications, nerve damage, and skin conditions. Treatment options vary depending on the underlying cause of anhidrosis, but may include medication, lifestyle changes, or surgery.

Medications and Feeling Hot

Finally, it’s important to remember that certain medications can also cause feelings of heat or flushing as a side effect. This includes medications like blood pressure drugs, hormones, and anti-inflammatory drugs.

According to the Mayo Clinic, common medications that can cause flushing or feeling hot include niacin (vitamin B3), certain antibiotics, and some chemotherapy drugs. If you’re experiencing symptoms of feeling hot or flushed and you’re taking medication, talk to your healthcare provider about whether the medication could be causing your symptoms.

Finding Relief from Feeling Hot

If you’re experiencing frequent or persistent feelings of heat, there are several strategies you can try to find relief. Some of these include:

  • Staying cool: Dress in lightweight, breathable clothing, use fans or air conditioning, and avoid direct sunlight during peak hours of the day.
  • Hydrating: Drink plenty of water, particularly in hot or humid weather, to help regulate your body temperature.
  • Exercising: Regular exercise can help regulate body temperature and improve overall health.
  • Relaxing: Practice stress-reduction techniques like deep breathing, meditation, or yoga to help reduce feelings of heat or discomfort.
  • Adjusting medications: If you suspect that your medications may be causing your symptoms, talk to your healthcare provider about whether there are alternative options.

When to Seek Medical Help

If you’re experiencing persistent or severe feelings of heat, sweating, or flushing, it’s important to talk to your healthcare provider. They can perform testing to determine the underlying cause of your symptoms and provide appropriate treatment.

According to the American Heart Association, you should seek emergency medical care if you have a fever that is accompanied by any of the following symptoms:

  • Shortness of breath or difficulty breathing
  • Chest pain or pressure
  • Severe headache or confusion
  • Unexplained rash or swelling
  • Severe vomiting or diarrhea


Feeling hot or flushed can be uncomfortable and inconvenient, but there are many possible causes. Some of the most common include hypothyroidism, diabetes, pregnancy, menopause, fever, anhidrosis, and medications. By taking steps to manage your symptoms and seeking medical attention when necessary, you can find relief and improve your quality of life.


  1. Centers for Disease Control and Prevention, Diabetes Basics
  2. American Thyroid Association, Hypothyroidism
  3. North American Menopause Society, Menopause 101