Nose is the second line of personal protection, picking nose is equal to self-destruction “portal”. Nowadays, many children, including adults, always pick their nostrils when they have nasal itch. Under normal circumstances, the nostrils do not have any uncomfortable feeling. However, nasal itch can be caused by the stimulation of nasal secretions, cosmetics, etc., or when eczema occurs in the nostrils. In these cases, symptomatic treatment should be given to eliminate the cause of nasal itch, rather than the practice of digging the nostrils to relieve nasal itch. Normal nostrils can also become itchy and dry when they are stimulated by polluted air or dry air, but do not use your fingers to dig your nostrils. It is not good to get into the habit of digging your nostrils to relieve the itch. Because there are many nasal hairs in the nostrils, these hairs are interwoven into a network, which can block the dust, particles, bacteria and other impurities in the inhaled air and play a role in cleaning the inhaled air and protecting the respiratory tract. In addition, the front of the nostrils are protected by skin, so that bacteria cannot invade. If you often dig your nostrils with your fingers, the hard nails can damage the skin in the nostrils and cause infections. Even if the infection does not occur, the damaged skin will form a scab when it heals, and it is very uncomfortable to have a scab in the nostril, so you will always want to dig it out with your finger. When the uncomfortable feeling of scabbing in the nose arises, you should be patient and restrain yourself from digging your nostrils with your fingers, so that after a few days, the wound will heal and the scab will fall off, and the uncomfortable feeling will disappear. If the scab surface is too large and the nasal itch is unbearable, you can apply some ointment or zinc oxide oil to soften the scab, and the nasal itch will be relieved. Some people think that it’s okay to dig your nostrils as long as you pay attention and don’t hurt yourself. Even if there is no nasal bleeding and no painful digging, it often causes minor abrasions, which destroy the normal protective function of the skin and open the way for bacteria to invade, resulting in infection and boils. Once a boil occurs in the nostril area, it is not only very painful, but the inflammation in this area can easily expand. If the boil is not treated in time, the inflammation can spread and become life-threatening, and since this area can easily lead to danger, it is medically called the danger triangle. Therefore, you must not get into the habit of picking your nose.