Chemical Engineering in Daily Life – Question 40: Why do your hands and feet get cold as soon as it gets cold?
Thread Content
Summer is coming to an end soon, and autumn is emerging. In TJ City, the highest temperatures during the day remain at 33-35 degrees, but at night the temperature has dropped from 27-30 degrees to 22-24 degrees. Some girls and middle-aged or older people’s hands and feet have once again started to turn cold. I suddenly understood why girls these days shout that they want kind guys ； Now I understand why former girlfriends, ex-wives, and wives like to put their cold hands around your neck. Please explain from the perspective of chemical engineering why, when the ambient temperature drops slightly, for example below 20 degrees, a considerable number of elderly people begin to feel cold in their hands and feet
The relative temperature difference is larger, resulting in more heat loss through radiation and conduction. There are many capillaries at the extremities of the hands and feet, which facilitates further heat loss
When the temperature difference between the human body and the surrounding environment is large, the heat exchange rate increases, and heat is transferred to the air more quickly. Older adults have slower blood circulation, which results in less heat being supplied to their bodies and thus a faster drop in temperature.
Hands and feet are farther from the heart, so blood circulation is slower there. Additionally, the regulatory ability of older people is weaker. The greater the temperature difference between the body and the outside environment, the more coldness is felt in the hands and feet due to heat exchange.
This is mainly due to the drop in temperature in nature, resulting in a deficiency of yang energy; meanwhile, the body’s own yang energy also becomes insufficient, leading to symptoms of yang deficiency. Furthermore, due to the cold weather, human blood vessels constrict and the ability of blood to return to the body is reduced, which leads to poor blood circulation in the hands and feet, especially at the fingertips. This is what is commonly referred to as poor circulation in the nerve endings, resulting in a constant feeling of coldness in the hands and feet. Such conditions occur more frequently in women, especially those in middle age or older. People who work mentally are more likely to experience cold hands and feet than those who do physical labor, and it is rare to see this phenomenon in healthy young men. Cold can cause poor blood circulation throughout the body or in certain areas, as well as disruptions in blood flow in the extremities, which leads to cold hands and feet
It’s time to truly assess heart function.
When the temperature drops below 20 degrees, a considerable number of elderly people start to feel cold in their hands and feet It seems unlikely; 20 degrees is still a pretty high temperature.
So how much can one see through? For example, I’m wearing a Nezha-themed outfit right now; the room temperature is 25 degrees, and my feet are cold – an uncomfortably cold feeling.
Generally, people with anemia and gastrointestinal diseases, those suffering from nutritional deficiencies, or those whose overall or localized blood circulation is impaired due to hypothyroidism, as well as those with circulatory problems in the extremities, can all experience cold hands and feet. Especially during menstruation, pregnancy, and childbirth, women are more prone to cold hands and feet due to physical weakness.
What kind of fashion is Nezha costume?
Haha, you know what I mean. The Nezha costume is the one worn in \"Nezha Makes a Havoc in the Sea\".