Children always have hard boogers in the nose, you can apply oil, sea salt water nasal spray waiting for its own discharge, usually pay attention to keep the surrounding air moist, if necessary, go to the hospital. Children with hard boogers in the nose, consider the surrounding air environment is dry, nasal mucous membrane secretion is too dry caused by, you can first apply lubricating oil, such as paraffin oil, and so on the boogers become soft, and then use a cotton swab to remove. Usually pay attention to keep the indoor air moist, you can use sea salt water to spray the nasal cavity, dilute the nasal secretion, promote the discharge of boogers. If necessary, you can go to the hospital ENT clinic, under the guidance of the doctor to deal with.