Nosebleed when washing face may be caused by nasal mucous membrane damage, nasal tumor, thrombocytopenic purpura and other diseases. 1. Nasal mucous membrane damage: if the patient’s nasal mucous membrane is damaged, when washing face, due to the high temperature of the water or extrusion, it may lead to rupture of blood vessels at the damaged place, which may lead to the situation of nosebleed. 2. Nasal tumors: Nasal tumors can also lead to bleeding when the nose is stimulated, mainly due to the damage caused by tumors to the nasal cavity and nasal blood vessels. 3. Thrombocytopenic Purpura: Thrombocytopenic Purpura can cause platelet reduction in the patient’s body, resulting in decreased coagulation function, and the action of washing the face can cause the blood vessels in the nasal cavity to rupture, thus causing bleeding. Hemophilia and other diseases can also cause patients to wash their face when the nose bleeds, when patients repeatedly appear this situation, to timely medical examination, so as not to delay the condition.