When a child cries, nosebleeds may be caused by sinusitis, deviated septum, dry nasal mucosa, etc. Targeted treatment should be carried out according to the cause of the disease, including general treatment, medication and surgical treatment. 1. Sinusitis: When there is inflammation and infection in the sinus area, it may induce congestion or erosion of the mucous membrane of the nasal cavity, which may cause an increase in nasal discharge, accompanied by the symptom of nosebleed. Antibiotics such as penicillin can be used as prescribed by the doctor for anti-infection treatment. 2. Nasal septum deviation: Nasal septum deviation is mainly an abnormality in the structure of the nasal septum, which may cause nosebleeds when the patient cries and causes irritation in the nose area. It needs to be treated with septoplasty or septum correction surgery as prescribed by the doctor. 3. Nasal mucosa dryness: If you are often in a dry environment or drink too little water, it may lead to an increase in the fragility of the capillaries in the nasal mucosa, and if you rub your nose when you cry, you may have a nosebleed. Dry nasal mucosa usually need to pay attention to the cleanliness and hygiene of the nose, drink a lot of warm water, do not go to the dry environment to improve the activities, if necessary, you can use a humidifier in order to maintain the appropriate indoor humidity. Nosebleeds can also be caused by other reasons, such as blood disorders, etc. Please consult the doctor for diagnosis and treatment to avoid delays. The above medications should be used in accordance with medical advice.