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 disease, 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 examination items of diffuse flushing at the end of the nose: 1. There are three commonly used methods of examination for peristome mites, squeezing and scraping smear method, transparent tape method and squeezing and bonding method, if the result of peristome mite examination is in normal value, it mostly suggests that the skin is in a healthy state, if it shows abnormal result, it mostly suggests the existence of disease. The lesions resemble seborrheic dermatitis, with hyperpigmentation and subjective micro-itching. Patients with symptoms such as rosacea, acne, blepharitis, itching of the external ear canal, papillitis, and vulvar pruritus need to undergo this test. The following 3 things should be noted during the peristome mite examination: people with skin scratching disorder and normal skin condition should not do this examination; maintain good skin hygiene before the examination and do not eat foods that are irritating to the skin; and cooperate with the doctor in a positive manner. 2.Hair follicle worm mite examination Squeeze and scrape smear method: usually use acne press to scrape, or squeeze by hand, or scrape the skin of the examined part with equipment such as the back end of a water-dipped pen tip, place the scraped out material on a slide, add 1 drop of glycerin, spread it out, and add a coverslip for microscopic examination. Transparent tape paste method: After normal facial cleaning, use transparent tape to paste on the nose, nasal groove, forehead, cheek and chin of the face at night before going to bed, and then remove the tape and paste it on the slide in the next morning to observe under the microscope. The detection rate of hair follicle worm mites is related to the stickiness of the adhesive paper, the site, area and time of the paste. Squeeze bonding method: After sticking transparent tape on the examination site, then squeeze the tape sticky part with the thumb and remove the tape for microscopic examination. This method has a high detection rate. In addition, the condition can be confirmed by gastroscopy. Parents are advised to take their children to the dermatology department of a regular hospital for examination and to choose an appropriate treatment plan according to the examination results. 3.Symptom check The face is easily flushed and congested in the early stage, which will soon subside completely with effective treatment. If improperly treated, it causes redness at the tip of the nose and gradually expands to the cheeks, between the eyebrows, forehead and chin; finally it becomes a persistent erythema with dilated capillaries. Initial rosacea should be treated early.