The specific causes of nosebleeds when washing the face are as follows: 1.Related to excessive dryness of the nasal mucosa; 2.When washing the face, if the water temperature is too high or when washing the face causes excessive rubbing of the nose, it may cause the local nasal mucosa blood vessels to dilate, erode and break, which may lead to the occurrence of nosebleeds; 3.Patients usually have symptoms of intermittent nosebleeds 4, combined with a certain degree of nasal and sinus inflammation, infection and allergic disease factors; 5, there is a significant deviation of the nasal septum; 6, the presence of nasal hemangiomas, bleeding polyps and other bleeding-prone growths, also prone to the occurrence of nosebleed symptoms. If the symptoms of nosebleeds occur repeatedly, it is necessary to pay attention to the corresponding examination of the nose and related systems of the whole body.