Patient: Description of the disease (onset time, main symptoms, hospital, etc.): Hello doctor, I would like to ask, I get up in the morning to go to the toilet as soon as I exert myself to get a nosebleed, it has been more than two months, may I ask what may be the cause of this? Doctor: There are many reasons for nosebleeds, but the most common cause of nosebleeds in adolescents is the dilation of blood vessels in the mucous membrane of the Pear’s area of the nasal septum. When coughing, sneezing, or constipation causes increased abdominal pressure, the dilated blood vessels may rupture. Bleeding emergency treatment is the head down position, pinch both sides of the nose, part of the bleeding can be self-stopping; if there is still blood flow, we should go to the otolaryngology clinic to check and fill the treatment. Normally, you should eat more vitamin-rich fruits, don’t be partial to food, don’t develop the habit of picking your nose, and keep your bowels smooth, etc. are all practices to avoid nosebleeds.