Many people have the habit of picking their noses in life, some for digging boogers, some become a subconscious action. However, rhinologists say that this habit is not only indecent, but also very unhealthy, because the blood vessels of the nasal mucosa are fine and superficial, so picking with force can easily cause the mucosa to break and bleed, triggering inflammation in the nose, and it is better to wash with warm water when you have a booger. Boogers are actually secretions from the nasal cavity. The mucus glands on the human nasal mucosa secrete some secretions that are used to protect and moisten the nose, and when the secretions dry, they form what is commonly known as boogers. The darker color of the boogers is the result of inhaling too much dust. Many people dig boogers, one is to feel dirty, in order to clean up the nasal cavity, and some because when the air is dry, feel nasal blockage, dry and itchy, so many people like to dig directly with their hands. The surface of the nasal mucosa is rich in capillary plexus, and its blood vessels are fine and superficial, so frequent and hard digging by fingers can easily cause damage or bleeding to the nasal mucosa. And once bleeding, there may lead to continuous bleeding until one to two weeks to recover. In addition, human fingers, especially the nails, carry a large number of bacteria. Frequent picking and digging of the nostrils will leave many bacteria in the nasal vestibule and other parts of the nose, which may cause nasal infections and induce nasal inflammation such as nasal vestibulitis and nasal vestibular boils. In addition, it should also be reminded that experts stress that boils in or near the nostrils must not be picked by hand. This is because the nose is located in the “danger triangle” of the face, where the venous return flows directly to the brain. If you pick, dig, squeeze or press the boil, the bacteria on your hands can easily cause the inflammation to spread. In severe cases, bacteria can directly invade the skull and bring about intracranial infections, which can even be life-threatening. It’s not that you can’t clean up a booger, but you must change a “gentler way”. Experts suggest using cotton swabs dipped in warm water to clean the nostrils. For the hard crust in the nostrils, you can micro-apply some oily substances such as sesame oil, olive oil, or erythromycin ointment, tetracycline ointment and other oily drugs to moisten before rinsing. In addition, patients with rhinitis, sinusitis and allergic rhinitis can use saline to clean their nostrils every day along with medication.