If there is a nosebleed generally try to sit down, when lying down the nosebleed will flow down the nasopharynx to the pharyngeal cavity, and if you fall asleep may even choke into the trachea causing breathing difficulties, so try to sit down and let the nosebleed flow down when it occurs. If there is a lot of bleeding, you can consider using cotton balls to plug the nasal cavity of the bleeding side and press the bleeding side of the nose to stop the bleeding. However, if there is more bleeding, it may come out from the other side of the nose or even from the mouth. Generally, you need to go to the hospital for further examination to see if there is a clear bleeding point in the nasal cavity, and if there is a clear bleeding point, you can consider doing electrocoagulation to stop the bleeding. However, if no clear bleeding point can be found, it is necessary to consider whether to do general anesthesia surgery to further explore the nasal cavity and find the bleeding point to stop the bleeding treatment.