Digging nose excrement often removes nose hair, which makes the nasal cavity become the portal of microbial invasion, and can also cause anterior nasal cavity infection, and in severe cases, it can cause intracranial suppurative infection.
People often have a lot of dirt under their fingernails, and there are countless germs inside. Nails are hard and sharp. When picking your nostrils, a little carelessness will damage the skin or mucosa of the nasal vestibule, causing bleeding and introducing bacteria directly into the wound.