Looking at one's own health through small aspects

Sweating occurs when sweating

Research has shown that the strength of the human body's tolerance to heat is related to the amount of heat stress proteins in the body's cells. People who regularly exercise have significantly increased synthesis of heat stress proteins in their bodies, which enhances their tolerance to heat and can resist the invasion of high temperature heat waves. People who enjoy enjoying air conditioning have reduced synthesis of heat stress proteins in their bodies, and their tolerance to high temperatures decreases. Once they leave the air conditioning and enter the hot and humid environment outside, they find it difficult to adapt. The sweat gland, as an "air conditioning device," can also fail to start up due to prolonged disuse, resulting in difficulty sweating and dissipating heat, making it highly susceptible to heatstroke.

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Link: Normal people excrete about 500 to 1000 milliliters of sweat per day, and can reach 1500 to 2000 milliliters in summer. If the sweat glands stop sweating or sweat excessively, it is an abnormal phenomenon. From the perspective of traditional Chinese medicine, sweat is a metabolic product of body fluids, known as the five fluids along with nasal mucus, tears, saliva, and saliva. In addition, sweat is also known as the heart fluid in the "Su Wen Xuan Ming Wu Qi", and the heart governs the blood, so there is a saying that sweat and blood share the same origin. Sweating too much can deplete energy and damage the body fluids, as well as the heart and blood.

Health from Sweat

Except for a few parts such as the lips that do not have sweat glands, the whole body has 2002.5 million sweat glands, which connect them for up to 2030 kilometers. Hot sweat is expelled from the chest, neck, back, and other areas, while cold sweat is expelled from the palms, soles of the feet, and armpits. These parts of the human body have well-developed sweat glands, with an average of 400600 sweat pores per square centimeter. According to experimental measurements, sweating 1 kilogram can lower body temperature by about 15 ℃. The main components of sweat are water and salt, with 1.53 grams of salt in 1 kilogram of sweat, making sweat salty. People who sweat excessively not only lose water in their bodies, but also experience a decrease in salt levels. When people sweat a lot, they should not only drink plain water, but also add an appropriate amount of salt to their drinking water or eat more slightly salty foods to meet the body's needs for water and salt, achieving a balance between income and expenditure.

1. Sweat volume

● No sweating: also known as closed sweating, refers to the reduction of sweat glands or the absence of sweat production in the body, resulting in partial or complete lack of sweating in the body. Some parts or the entire body of the patient's skin are very dry, and they have mostly suffered from skin diseases (such as psoriasis, scleroderma, etc.), which have blocked pores and caused sweating. In addition, if the body's metabolism is disrupted, sweating may also occur.

● Hyperhidrosis: Hyperhidrosis refers to sweating heavily even under constant temperature and static conditions. If excessive sweating is accompanied by palpitations, overeating, emotional fluctuations, and insomnia, it may be hyperthyroidism. If there is excessive sweating, dizziness and fatigue, as well as feeling hungry, it may be due to low blood sugar and poor liver function. After taking certain medications, excessive sweating may also occur. If sweating is like beads and cold sweat does not stop, attention should be paid. This is a manifestation of Qi dispersing deficiency, which is called "sweating cessation" in traditional Chinese medicine and is a sign of critical illness.

2. Sweating time

● Self sweating: During the day, in a state of mental clarity, sweating occurs spontaneously without being caused by labor, wearing thick clothing, or high temperatures. Traditional Chinese medicine believes that this is a manifestation of qi deficiency and yang deficiency, where the body involuntarily sweats due to the loss of absorption power. People who sweat themselves usually have low spirits, shortness of breath, and fear of cold.

● Night sweats: Refers to sweating heavily on the chest, back, thighs, and other areas at midnight or dawn after falling asleep, which can make clothes wet. After waking up, there was no sweating. Excessive night sweats caused by Yin deficiency, accompanied by symptoms such as low-grade fever, red cheekbones, palm fever, and dry mouth, may be a sign of lung disease, such as tuberculosis.

3. Sweating Area

● Head Sweat: Sweating is mainly on the head and face, which is caused by heat and qi deficiency in the liver and stomach. If there are both cold limbs and shortness of breath, it is mostly due to Yang Qi deficiency. If there is sudden sweating on one side of the forehead, it is mostly due to stimulation of the sympathetic nervous system in the neck, which may indicate the presence of an aneurysm.

● Hand and foot sweating: When feeling nervous, one may sweat on their hands and feet. Without this, their hands often become damp and cold, often due to damp heat in the spleen and stomach, qi deficiency, and kidney deficiency.

4. Color of Sweat

Generally, human sweat is colorless and can also be slightly yellowish, which is the normal color of human sweat. People with different illnesses may have varying levels of sweat color, which serves as a symptom indicator. If a person takes potassium chloride, their sweat will turn red. Excessive consumption of egg yolks and carrots can cause sweat to turn dark yellow.

Link: Sweating immediately after eating

This condition is medically known as "dietary hyperhidrosis". Mainly manifested as excessive sweating during each meal, especially when consuming hot or stimulating foods. Generally limited to the lips, forehead, cheeks, nose, chin, and other areas, severe cases can also cause excessive sweating in the chest and back. After stopping eating, sweating gradually decreases until it stops. Dietary hyperhidrosis can be divided into primary and secondary types. Most primary diseases occur from childhood, mainly due to central nervous system dysfunction, which causes excessive excitation of sweat gland secretory fibers in the autonomic nervous system. Secondary cases are more common in patients with peripheral neuropathy, such as peripheral nerve damage. The above symptoms generally do not require treatment and there is no effective therapy. Severe cases can undergo parasympathetic nerve blockade surgery. Excessive sweating may be a precursor to disease. Hypoglycemia: There are many reasons that can cause hypoglycemia, and it can be mainly manifested as symptoms of sympathetic nervous system overexcitement. During an attack, a sudden drop in blood sugar stimulates sympathetic nervous system excitement, releasing a large amount of adrenaline, which can lead to a large amount of cold sweat.

Hyperthyroidism: Refers to hyperthyroidism. Being afraid of heat and sweating is one of the characteristics of this disease, and it also manifests as symptoms such as mental stress, personality changes, restlessness, inability to concentrate, and difficulty falling asleep.

Pheochromocytoma: Its common symptom is sweating profusely, with intermittent and sometimes persistent sweating. However, facial flushing or whitening can occur simultaneously during intermittent episodes. There may also be palpitations, hand tremors, and coldness in the limbs. But the onset of this disease is often accompanied by a significant increase in blood pressure and the resulting headache symptoms.