Frequent nosebleeds may be caused by dry nasal mucosa, deviated nasal septum, nasal cancer and blood diseases. 1. Nasal mucous membrane dryness: If the patient’s nasal mucous membrane is too dry, the nasal mucous membrane may be broken under slight stimulation, thus frequent nosebleeds occur. This phenomenon is usually due to the patient’s daily water intake is too small, resulting in the body in a state of dehydration for a long time, or the external temperature is too low, the air is too dry and other reasons. 2. Deviated nasal septum: This disease is usually caused by the uneven development of the abnormal cartilage in the growth and development of the nasal septum, or once suffered from nasal trauma, etc. The mucous membrane on the deviated side becomes thin. Due to the thinning of the mucous membrane on the deviated side, the tension is high, and the airflow stimulation can easily lead to the septum mucous membrane erosion and bleeding. Thus, it manifests as frequent nosebleeds. 3. Nasal cancer: malignant tumor occurring in nasal cavity and sinus, etc. It is clinically considered to be related to patients suffering from chronic nasal diseases, long-term inhalation of irritating and chemical substances or gases, and long-term exposure of nose to radiation. Patients with this disease often suffer from nasal congestion, nosebleed, nasal pain, headache and other symptoms, which leads to frequent nosebleed. 4. Blood diseases: such as leukemia, thrombocytopenia and hemophilia, etc., can lead to frequent nosebleeds due to blood clotting dysfunction. It is recommended that patients who have frequent nosebleeds should consult a doctor as soon as possible for examination and treatment after clarifying the cause of the bleeding.