Redness is a blush caused by a sudden rush of blood to the cheeks, which appears as a red mass with a thick center and faded surroundings. It is often caused by sympathetic excitement in the body and increased secretion of catecholamines such as norepinephrine, resulting in an increased heart rate and capillary dilation. It is commonly seen in diseases such as cholinergic urticaria, penile tuberculosis rash, and cowpox-like blistering disease. A look that is usually produced when a person is embarrassed or in a special atmosphere is called a flush. The flush that generally appears on a young girl’s face alludes to the coy expression that occurs when a young girl is shy. It can also be compared to the blush that appears on the face when you are drunk. If you have a flushed face, you can be diagnosed. It is also important to be aware of the possibility of a primary disease, and to consider relevant tests, etc., if necessary. Differentiate from menopausal blushing, histamine blushing, and carcinoid blushing. The facial phenomenon caused by facial capillary dilatation or superficial location of some of the capillaries is the main reason for erythema. The face of patients with facial erythema looks redder than the normal skin tone, which is often called plateau face or red face, and some are simply red on both cheekbones with rounded borders, generally arranged in filaments. This kind of skin is thin and sensitive, and the face is more red when it is too cold, too hot, or emotionally excited. Severe cases also form deposition discoloration.