There are many common causes of redness at the tip of the nose. The tip of the nose is rich in blood vessels, and redness can occur when the local blood vessels dilate due to cold or hot stimuli. Rosacea, also known as rosacea, is characterized by redness centered on the tip of the nose, spreading to both sides of the nose. If the tip of the nose is blocked by hair follicles, resulting in follicle infections and the formation of pimples, the tip of the nose will also become red. The blood vessels in the tip of the nose of women with thin horny layer are under the skin, and the tip of the nose will look red. If the tip of the nose comes into contact with allergic substances, and local allergic symptoms occur, the skin of the tip of the nose will be red, and it will be accompanied by itching of different degrees. Summer nose area by mosquito bites will also appear tip of the nose redness, occasional redness of the tip of the nose, it is recommended to keep the local skin clean, avoid scratching, reduce the local stimulation, to observe the main.