Nosebleeds, dry mouth and headaches may be caused by acute rhinitis, sinusitis, hypertension and other reasons. 1. Acute rhinitis: bacterial and viral infections lead to acute rhinitis caused by upper respiratory tract infections, due to the swelling of the nasal mucosa, runny nose, often blowing the nose to damage the local mucosa, nosebleeds, accompanied by dry mouth, headache and other symptoms. 2. Sinusitis: Inflammation of the sinuses, manifested by nasal congestion, runny nose, headache and other symptoms, because often blowing the nose leads to nasal mucous membrane damage nosebleeds, nasal mucous flow back into the throat, causing discomfort, resulting in a feeling of dry mouth. 3. High blood pressure: because the walls of blood vessels are under pressure, continuously at a high pressure value, which is not well controlled, leading to the expansion of blood vessels in the brain causing headaches, nosebleeds, dry mouth symptoms. Nosebleed with dry mouth and headache, it is recommended to consult a doctor in time to identify the cause of the disease and follow the doctor’s instructions for treatment.