If the child’s nostrils often have boogers, it often means that the child’s nose is relatively dry. Parents can use cotton swabs appropriately dipped in saline to gently clean the nostrils, the main purpose is to improve the child’s nasal ventilation. However, if the deep nasal cavity is particularly full of boogers, it is best to go to the hospital and let the doctor clean it up, which can be done under the nasal endoscope to avoid nasal bleeding. Parents can spray their children with physiological sea salt water to moisturize their nasal passages, and they must pay attention to the humidity of the living environment at home, and it is best to place an air humidifier. If the nostrils are particularly dry, it is best to apply erythromycin ointment evenly inside the child’s nostrils before going to bed.