Diffuse flushing at the end of the nose is one of the symptoms of rosacea. Rosacea, also known as rosacea, rosacea, wine (chappy) nose, rosacea, etc. The cause of diffuse flushing at the end of the nose is not well understood probably due to the dysfunction of the capillaries in the affected area due to dysfunction of the vasodilatory nerves for a long time on the basis of seborrhea and the action of various harmful factors inside and outside the body. Alcoholism, smoking, irritating diet, digestive tract disorders, endocrine dysfunction (especially during menopause), mental factors, focal infections, cardiovascular diseases, intestinal parasites, long-term hot and cold factors acting on the skin such as high temperature work, sun and cold, wind, etc. can trigger and aggravate the disease. The disease occurs in the middle of the face, mainly the tip of the nose, nose, followed by the cheeks, chin, forehead, often symmetrically distributed in middle-aged people, more women, patients with seborrhea face as if sebum coating. The lesions are erythema, capillary dilation and inflammatory follicular papules and pustules, etc. The course of the disease is slow and can be divided into three stages, but there is no obvious boundary. Staging diagnosis of diffuse flushing at the end of the nose: 1. Erythema phase Local skin diffuse flushing or scattered erythema begins to be temporary, receding from time to time, then repeatedly occurring and long-lasting finally permanent, local skin greasy, at this time capillaries and small blood vessels expand especially the tip of the nose and the nasal wing shallow blood vessels are often very obvious, dendritic. Sometimes the capillary dilation is more obvious than the flushing, and sometimes the flushing is more obvious than the capillary dilation. 2.Papular pustular stage The disease continues to develop on the basis of erythema with batches of follicular acne-like papules and pustules, but no acne formation, especially at the tip of the nose, when the capillary dilation is more obvious, crisscrossed in a spider web shape. 3, the nasal superfluous period long period of time due to the affected sebaceous glands and connective tissue hyperplasia hypertrophy, vascular expansion, resulting in the nasal tip hypertrophy to form nodular bulges of varying sizes, known as nasal superfluous. The surface of the uneven sebaceous gland mouth is obviously expanded, squeezed when there is white sticky sebum secretion overflow, capillaries are significantly dilated.