Swelling of the hands and feet is often seen, and clinical studies have found that there is physiological swelling that is nothing to worry about. However, there are also some that are pathological and related to certain diseases. Therefore, it is important to identify the cause of swollen hands and feet. The causes of swollen hands and feet are as follows: 1. Experts say that swelling is often a signal of certain diseases. So what’s wrong with swelling? Studies have found that heart disease, liver disease, kidney disease, endocrine disease and certain malnutrition diseases may show symptoms of swelling, which should normally be seen in a hospital. However, some swelling is a physiological reaction, so there is no need to worry too much. 2. Idiopathic puffiness, or puffiness called poor blood circulation, is a physiological reaction. Puffy face often occurs in people with poor blood circulation and metabolism. This group includes people who are used to drinking a lot of water before going to bed, people who are often sedentary, people who usually have a heavy diet, people who often stay up late, and people who are born with poor body metabolism. 3, reactive puffiness is also a physiological reaction. It is often caused by the expansion of blood vessels on the body surface due to heat and high temperature, which increases arterial blood flow; the expansion of superficial veins, which increases capillary filtration pressure; coupled with standing or sitting for a long time, body fluids seep in the interstices of subcutaneous loose connective tissue and slow reflux, thus causing swelling of the lower limbs, mostly in people who are obese or older. When swelling of the hands and feet occurs, patients should not worry too much, but should first identify the cause, and if it is caused by disease, pay great attention to it and actively treat it.