Men feel cold all over the body at night during sleep

Generally, men experiencing coldness throughout the body during sleep at night may be due to individual constitution, low ambient temperature, kidney yang deficiency, hypothyroidism, anemia, or other causes. It is recommended to seek timely medical evaluation to determine the underlying cause and receive appropriate treatment under the guidance of a qualified physician. Specific analyses are as follows:

1. Individual Constitution

Differences in individual constitution may lead to poor peripheral circulation, slowing blood flow to the hands, feet, and other extremities. This impaired circulation can cause men to feel cold in their limbs and entire body during sleep. Regular physical exercise can help improve blood circulation. Maintaining healthy lifestyle habits, avoiding prolonged inactivity, and engaging in regular physical movement are also beneficial.

2. Low Ambient Temperature

Body temperature fluctuates with changes in external temperature. When nighttime temperatures drop, inadequate indoor heating or thin bedding may lead to decreased skin surface temperature, resulting in a sensation of full-body coldness during sleep. Increasing indoor warmth—such as using heaters, electric blankets, or adding thicker blankets—can help alleviate this issue.

3. Kidney Yang Deficiency

Kidney yang deficiency refers to insufficient yang energy in the kidneys, which slows down the body's metabolism and reduces heat production. This condition may manifest as chills and generalized coldness during sleep. Symptoms may also include soreness and weakness in the lower back and knees, frequent nighttime urination, and reduced sexual function. Treatment may involve medications such as Jin Kui Shen Qi Wan, You Gui Wan, or Ji Sheng Shen Qi Wan, as advised by a physician.

4. Hypothyroidism

Hypothyroidism results from inadequate secretion of thyroid hormones. In men, insufficient thyroid hormone levels can reduce metabolic rate and impair temperature regulation, leading to a persistent feeling of coldness throughout the body during sleep. Additional symptoms may include fatigue and weight gain. Treatment may include medications such as methimazole tablets, levothyroxine sodium tablets, or propranolol hydrochloride tablets, as prescribed by a doctor.

5. Anemia

Anemia typically occurs due to a reduced number of red blood cells in the peripheral blood. When red blood cell count decreases in men, the blood’s oxygen-carrying capacity is diminished, potentially causing oxygen deprivation in various tissues—especially in peripheral areas—leading to a sensation of whole-body coldness during sleep. Symptoms may also include fatigue, weakness, dizziness, and palpitations. Treatment may involve iron supplements such as ferrous sulfate tablets, vitamin C tablets, and folic acid tablets, used under medical supervision.

Maintain a healthy diet by avoiding spicy and irritating foods, and engage in regular exercise to strengthen immune function.