Running will increase the amount of respiration, sometimes through the nose can not meet the requirements of inhalation, runners will breathe through the mouth to supplement the amount of oxygen needed, so after running 1000 meters, the throat and nasal cavity are in a state of overload, if the usual exercise is not enough, may lead to a mouth full of blood after running, but also due to the increase in blood flow in the lungs during the run, the emergence of pulmonary edema, resulting in a mouth full of blood after running 1,000 meters. Bloody taste, this time you need to local gargle and rest, but also need to carry out symptomatic treatment. 1, local gargle and rest: 1000 meters after running a mouth full of bloody taste may be the nasal cavity, or oral mucous membrane overload caused by local stimulation, you can use a small amount of water for local gargle, full rest, to see if the bloody taste can be reduced. If after the above treatment, the bloody flavor quickly disappears, indicating that it is only a stress reaction, and there is no obvious mucosal lesions; 2, symptomatic treatment: if the oral cavity or nasal cavity after gargling blood flow, full rest after the taste is still not significantly reduced, you need to go to the hospital in time for examination, you can do the endoscopy of the nasal cavity. If the nasal mucosa rupture bleeding, you can use the index finger and thumb to pinch both sides of the nose to stop bleeding, or stuffed with cotton balls to stop bleeding. If laryngitis occurs, in mild cases, you can drink more water, ensure enough sleep, and avoid inhaling dust and other substances, while in serious cases, you need to take medication, usually using drugs such as pharyngitis tablets, pudilan anti-inflammatory oral solution, etc., which can help to relieve the dryness and pain in the throat. If your mouth is full of blood after running 1000 meters, you need to rest in time and observe whether the symptoms are relieved. In addition, you need to pay attention to proper exercise in daily life and avoid strenuous and excessive exercise.