Is there any superstition that speaks of red hot ears?

There are three cases of heat in the ears. One is that after doing strenuous exercise, one tends to feel heat in the ears. This is because when people exercise, the heart beats faster and supplies more blood to the muscles of the limbs. After the body exercises, the muscles need less blood, but the heart does not slow down immediately, so more blood rushes to the heart. The skin of the head and ears is very thin and covered with abundant blood vessels. When a large amount of blood flows through the ears, the blood vessels dilate and thicken, the ears become red, and because the blood has a certain temperature, the ears feel hot. When the heart gradually returns to normal, the blood vessels contract and become thinner, and the blood in the ears decreases, so the ears are no longer hot.

The second is that when the outside temperature is low, the blood vessels are cold and contracted, pale, then if you go into a room with a higher temperature, the blood vessels suddenly thickened by the heat, the ears will also feel hot.

The third is due to shyness also when, and people argue heatedly, or when the examination encountered difficult problems ...... will also feel the root of the ear is very hot. This is because the cerebral cortex is highly excited and tense due to the command nerve caused by the skin blood vessels expand, the heart beats faster, the blood flow increases the cause.