There are many reasons for bleeding gums and waking up in the morning with blood in the mouth, such as gum injury, periodontal lesions, nasal lesions, and blood disorders. 1. Gum injury: Gums are scratched by sharp substances, which can lead to breakage of the gums, and therefore can lead to bleeding gums and blood in the mouth when you wake up in the morning. 2. Periodontal lesions: gingivitis, periodontitis can also lead to bleeding gums get up in the morning there is blood in the mouth phenomenon, mainly due to poor oral hygiene, the presence of plaque in the mouth, dental calculus, tartar and other substances, stimulate the gums to appear inflammatory reaction, which can lead to bleeding gums. 3. Nasal lesions: nasal cavity if there is a lesion, can lead to nasal capillary rupture, bleeding, due to the blood backflow into the mouth during sleep, so there will be bleeding gums in the morning to get up with blood in the mouth. 4. Blood diseases: abnormal coagulation function, leukemia and other diseases, can also lead to bleeding gums in the morning to get up with blood in the mouth phenomenon. Gum bleeding in the morning to get up with blood in the mouth for many reasons, after the symptoms are recommended to go to the hospital in a timely manner to improve the examination, follow the doctor’s instructions to take standardized treatment, not to private treatment, so as not to lead to adverse consequences.