When the weather is cold, the blood vessels of human body contract, and the ability of blood return will be weakened, which makes the blood circulation of hands and feet, especially the toe tip, not smooth, which is often called "poor circulation of nerve endings", resulting in cold hands and feet.

2. cardiovascular diseases

Cardiovascular diseases such as heart disease make blood circulation poor, which will lead to cold hands and feet.

3. Renal function is impaired.

Impaired renal function reduces the effective blood perfusion of the whole body and makes the blood circulation of the whole body in a bad state.

4. Thymus function is weakened

Because thymus is the main organ of body temperature regulation, when the function of thymus is weakened, cold hands and feet may appear.

5. Other factors

Frostbite, physical and mental stress, drug side effects, etc. Poor blood circulation will lead to cold hands and feet. In addition, Raynaud's syndrome can also cause cold hands and feet.

6. Etiology and pathogenesis of traditional Chinese medicine

(1) Yang deficiency: the factor of deficiency of kidney yang; Or sweating due to fever and yang leakage; Or after vomiting and diarrhea, the yang is suddenly cut off; Or after massive bleeding, qi goes with blood, resulting in cold hands and feet.

(2) Exogenous cold pathogen: Because cold pathogen invades the muscle surface, cold is yin pathogen, which leads to stagnation of its nature and inhibition of Yang Qi outside the defense. And cause cold hands and feet.

(3) Heat pathogen is depressed inside: external pathogen enters from exterior to interior, stagnates into heat, internal heat is abundant, and extreme heat sinks into yang; Or exogenous pathogens invade the liver and stomach, qi stagnation and blood stasis, and Yang Can can't get through the limbs, resulting in cold hands and feet.

(4) Stagnation of liver-qi: emotional disorder, anger hurting the liver, liver-qi failure, stagnation of qi, imbalance of yin and yang, cold hands and feet.

(5) In addition, deficiency of qi and blood or various pains can also cause cold hands and feet, and the primary disease will disappear after treatment.

Common diseases

Heart disease, Raynaud's syndrome, etc.

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