A small amount of blood when rinsing the nose with saline may be due to mucous membrane damage, nasal swelling, abnormal coagulation factors, etc. A clear diagnosis is needed to choose the appropriate treatment, such as general treatment, medication or surgical treatment. 1. Mucosal injury: When rinsing the nose with saline, if too hard, it may cause nasal mucosal injury, so there will be a small amount of blood. This phenomenon does not require special treatment, pay attention to the strength of rinsing, or you can choose physiological sea saline nasal spray to rinse the nasal cavity. 2. Nasal swelling: nasal polyps, tumors, etc., can also lead to the phenomenon of a small amount of blood when rinsing the nose with saline, tumors caused by the need for surgical treatment. 3. Abnormal coagulation factors: Abnormal coagulation factors in human body can lead to coagulation dysfunction, which can also lead to the phenomenon of small amount of blood when rinsing the nose with salt water. It is necessary to take appropriate treatment according to the specific situation. When rinsing the nose with salt water, a small amount of blood, you can pause rinsing, observe the bleeding situation, such as persistent unrelieved, it is recommended to go to the hospital in a timely manner to improve the examination, as prescribed by the doctor to take standardized treatment.