Water temperature control
When taking a foot bath, pay attention to a moderate temperature (the best temperature is 40~45℃), which not only prevents the water temperature from being too high and burns the skin, especially those who are comatose and unable to take care of themselves, and at the same time, cold water has a constricting effect on blood vessels and is beneficial to health. It is best to allow the water temperature to gradually become warmer according to the foot adaptation. Usually the initial temperature of the foot bath is not more than 40 degrees Celsius, because the initial skin temperature of the foot bath is low, between 30-32 degrees Celsius, if the temperature difference is greater than 8 degrees Celsius, the water will feel hot, especially in winter. Still obvious. Therefore, it is best to put your feet below 40 degrees Celsius. After the feet are used to it, slowly heat it until it reaches the highest temperature that can be tolerated. The heating method, if economic conditions permit, it is best to buy a foot bath with a heating device. The economy does not permit, you can also use the method of heating the water while soaking your feet. The main purpose is to maintain the water temperature. Of course, the hotter the foot bath, the better. When taking a foot bath, the thermal effect of water is used to gradually transfer the temperature from the cortex of the foot inward, causing the body to produce a series of responses to thermal stimulation. Among them, the nervous system and cardiovascular system are the most sensitive to hydrotherapy, which can accelerate blood circulation. , speed up the metabolism, the effect of tranquility. Since the temperature is proportional to the speed of blood circulation, the acceleration of blood circulation is the basis of metabolism, so as to improve the ability of oxygen supply, nourishment and elimination of waste (commonly known as detoxification), so that the human body can achieve a good balance function, Ultimately achieve the purpose of health care. According to relevant information, during a hot foot bath, the blood circulation rate of the human body can reach more than 10 times the usual speed (there are big differences with age, gender, and physical condition), while the ordinary massage is only 1--1.5 times the usual. Therefore, every time you take a foot bath, it is possible to supplement the body's hypoxia, remove accumulated waste from the body, and repair some abnormal functions.
 
2. Time control
The time of foot bath is 30 to 40 minutes. There is a simple method, you can experience sweating when you soak your feet. If the whole body is sweating, the time should be right, but those who are weak should pay attention to replenishing water in time, and it is not advisable to sweat too much, which is generally more reasonable. time, and there will be good health effects. However, it should be noted that this method cannot be used when the water temperature is too low. The time of foot bath is also the key to foot bath health care, because foot bath therapy is a local bathing activity, especially the warming effect, which must be transmitted slowly to the whole body, and this transmission is basically completed by blood circulation. In the process of blood circulation, one side transmits most of the heat at the same time, and the other is that because the feet belong to the systemic circulation, the blood needs to be redistributed from the heart to different circulatory systems in each cycle. The transfer of the thermal effect of the internal circulation requires multiple distributions to achieve the effect, so a longer foot bath time is required. The foot bath time varies greatly depending on the physical condition, environment and other factors. Generally speaking, the physical condition with good circulation or when the ambient temperature in summer is high, the time can be appropriately shortened, and the blood circulation is poor or in the winter environment. The time can be extended when the temperature is lower. In general, the average time of each foot bath should be about 20--40 minutes, in order to achieve the whole body warm and stimulating effect, and then have a good foot bath effect.

3. Unwell people
Patients with severe heart disease; patients with unhealed cerebral hemorrhage; patients with foot inflammation, skin disease, trauma or skin burns; patients with bleeding diseases, septicemia, etc.; ; children (should be used with the help of adults); those who are insensitive to temperature (should control the temperature well to avoid burns), they are not suitable for foot baths.
 
4. Other matters needing attention

1. It is not advisable to take a foot bath 30 minutes before meals and after meals, because foot baths will dilate the blood vessels of the feet and increase the blood volume, resulting in a decrease in the blood of the gastrointestinal and internal organs, which will affect the digestive function of the gastrointestinal tract. When taking a foot bath, due to the expansion of blood vessels in the feet and lower extremities, the blood volume increases, which can cause acute anemia in the head, dizziness and dizziness. When the above symptoms occur, the feet can be washed with cold water, so that the blood vessels of the feet can be constricted, and the blood flow can be fully flowed to the head, so as to eliminate the acute anemia of the head and relieve the symptoms.