Waking up with yellow saliva and occasional blood, may be gingivitis, periodontitis, oral traumatic blood blisters and other conditions, need to analyze specific problems. 1. Inflammatory diseases such as gingivitis or periodontitis: gingiva, periodontal membrane and other tissues due to inflammation, there will be redness, swelling, congestion and other manifestations, if the local tissue rupture, there will be yellowing of saliva, occasional bleeding and other manifestations. Patients are often accompanied by periodontal abscess, bad breath and other symptoms. 2. Oral traumatic blood blisters: mainly due to the rupture of blood blisters caused by waking up with yellow saliva, bleeding and other manifestations, often accompanied by a sense of foreign body in the mouth, swallowing pain and other manifestations. Waking up with yellow saliva and occasional blood, it is recommended to go to the regular hospital in time, clear diagnosis and treatment as prescribed by the doctor.