The human nasal mucosa itself is relatively thin, and if patients often pick their nostrils with their hands, it can easily lead to the rupture of the nasal mucosa, resulting in bleeding. After bleeding, a crust will form on the surface of the broken mucosa and sometimes the patient will have a distinct foreign body sensation and the nose will be particularly dry, so the patient cannot help but pick his nose again. If the mucous membrane does not heal, digging the nostril again will easily lead to nosebleeds again. Repeatedly, if the situation does not heal, it will easily lead to erosion of the patient’s nasal mucous membrane, which may aggravate the bleeding of the patient’s nose, and may easily lead to bleeding when the nose is gently touched. So patients must develop good habits in life, do not often digging nostrils, if the nose dry can be sprayed with physiological sea saline.