The treatment of nosebleed with black stool depends on the cause of this symptom, it is best to go to the hospital for examination, to clarify the cause of the disease and then receive the relevant treatment, such as finding out the cause of the nosebleed to stop bleeding, preventing rebleeding, and so on. The black color of stools in nosebleeds is generally considered to be the result of rupture of the mucous membrane of the nasal cavity and bleeding, and swallowing of blood into the gastrointestinal tract, which causes the color of stools to change to black. In this case, if the nosebleed is only transient, you can observe it first. If the nosebleed is more than that, it is recommended to actively seek medical treatment to find out the bleeding point of the nasal cavity and receive appropriate treatment. In addition to the above, we also need to consider thrombocytopenia and other coagulation system diseases, liver disease, upper gastrointestinal system diseases, it is best to go to the hospital to check the blood routine, stool routine, coagulation function, etc., to rule out the above diseases. When the situation of black stools with nosebleed occurs, it is recommended to actively seek medical treatment to clarify the cause of the disease and then receive relevant treatment, which should not be taken lightly.