People usually take a hot bath to relieve their fatigue after a busy day. In fact, bathing is not the hotter the water, especially for people with high blood pressure and heart disease. There are also many cases of cerebral stroke and myocardial infarction caused by incorrect bathing of high blood pressure and heart patients. As a southerner, taking a hot bath with a suitable temperature in winter is simply the greatest enjoyment of the day. Some studies have shown that continuous contact with 44 ℃ hot water for about 6 hours will lead to degree II-III scald. If the water temperature rises by 5 ℃ (that is, 49 ℃), it will take 10 minutes. However, contact with hot water above 60 ℃ for more than 10 seconds may cause deep scald.
how hot water can burn your skin
Scald is a kind of burn. According to the depth of the affected skin, it can be divided into I degree, shallow II degree, deep II degree and III degree. Although most scald cases are not life-threatening, deep degree II burns and scalds will leave obvious scars on the affected areas. In addition to causing a great economic burden, they also bring lingering psychological shadows to patients and their families.
In 1977, more than 80% of households in Washington state of the United States had their domestic hot water temperature higher than 54 ℃, and the average water temperature was about 61 ℃. This caused a large number of scald cases in the family environment. Nearly 1 / 4 of children’s scalds were caused by the hot water with too high temperature in the faucet.
what is the proper water temperature for bathing in winter
There are many things to pay attention to when bathing in winter. The first is the water temperature. The suitable water temperature for bathing in winter is 37 ℃ to 42 ℃, which is 3 ℃ higher than the body temperature. In addition, when bathing in winter, you should start with your feet, because the skin temperature in winter is lower than the bath water temperature, and the bath water temperature in winter is higher than that in summer. The sudden hot water will put too much load on the heart.
never take a hot bath in three times.
1. Don’t wash before sex
It will inhibit the excitability of sexual central nervous system and reduce the pleasure of sexual life. The blood and oxygen supply to the heart, brain and other important organs will be reduced. In addition, the skin is sensitive to temperature. Too cold or too hot will reduce the sensitivity of the skin and reduce the pleasure of sex. Finally, hot water immersion will affect the number and quality of sperm, which is not conducive to eugenics.
2. Don’t wash before going to bed
“Before going to bed” and “hot water” in “taking a hot bath before going to bed” are both wrong concepts and violate the physiological laws of the human body. Hot water for bathing will rapidly increase the temperature of the human body, which will inhibit the secretion of melatonin in the brain and slow down the time for the brain to release melatonin. The main role of melatonin is to induce natural sleep and overcome sleep obstacles by regulating people’s natural sleep.
3. Don’t wash immediately after exercise.
Taking a bath immediately after exercise will increase the blood flow to muscles and skin, and the blood supply to other organs will be insufficient. At the same time, breathing is not stable after exercise, and then you enter the bathroom. In the case of poor air circulation, it is easy for the brain to lack oxygen, which may lead to dizziness, weakness and other symptoms. In serious cases, it may also cause blood pressure drop, collapse shock and syncope.