Rosacea, also known as rosacea, is a chronic inflammatory skin disease that mainly occurs in the center of the face with erythema and telangiectasia. It is more common in middle-aged people aged 30 to 50, and is more common in women.

The cause is not entirely clear. It may be due to seborrhea and various harmful factors inside and outside the body, causing vasomotor nerve dysfunction in the affected area and long-term capillary dilation. Trichocystis parasites and repeated local infections are important factors in the disease. Alcoholism, smoking, stimulating diet, digestive tract dysfunction, endocrine dysfunction (especially menopausal period), mental factors, focus infection, and long-term hot and cold factors that act on the skin such as high-temperature work, sun exposure, cold, wind, etc. Can induce and aggravate the disease.