First of all, after drinking wine, the human body feels warm, not because the wine itself has a lot of calories. The main components of wine are alcohol (ethanol) and water. The calories of alcohol are very limited, not to mention water. Secondly, drinking makes people feel hot. In fact, heat is "arched" from the inside to the body surface. The body surface feels warm and the body is getting cold. In fact, the total amount of heat energy remains unchanged, just a deception of physical feelings.
It turns out that ethanol, the component of alcohol, has the function of dilating blood vessels. Therefore, after drinking, blood vessels dilate → blood circulation and breathing accelerate → fever in the body (viscera, muscles, etc. Radiation from blood flow to body surface (skin) is faster → the body feels hot. This is the truth behind the illusion.
Finally, it should be pointed out that alcohol and its metabolites have a certain anesthetic effect on our central nervous system, which also makes the skin less sensitive to the cold outside, so it feels less cold after drinking.
Extended data
Drinking to keep warm and dissipate heat is faster.
The more you drink, the faster you drink, and the higher the alcohol level, the more you can "feel warm", because the higher the alcohol concentration in the blood, the faster the blood gas runs and the more calories it emits. However, this belongs to "quenching thirst by drinking poison".
Hu pointed out that "temperature" after drinking is a temporary phenomenon, and "cold after drinking" follows. Because the core body temperature is lost, the dilated capillaries can't contract in time, which prevents the heat from continuing to lose. Even if you don't stop drinking, your body temperature will continue to drop, your body's cold feeling will increase, and even people will tremble and get goose bumps!
In addition to the "cold after drinking" mentioned above, we often encounter patients with hypertension who mistakenly think that "a small amount of drinking is beneficial" in clinic. They found that after drinking alcohol, blood pressure was normal, but unexpectedly, it didn't take long for "blood pressure to break the table", because alcohol expanded blood vessels, which temporarily reduced the pressure of blood flow on blood vessel walls, and then blood vessels contracted more desperately!
Reference materials? People's Network-Drink to warm up? Your feelings deceive you.