Waking up early with mucus and blood in the mouth may be related to bleeding gums, damaged oral mucosa, oral hemangioma and other reasons. 1. Gum bleeding: If there is a large amount of plaque and calculus in the gingival sulcus, it can lead to bacterial growth there, causing inflammation of the gums and periodontium, which in turn causes the symptom of bleeding gums and mucus and blood in the mouth in the morning. 2. Damage to the oral mucosa: If the residual roots, crowns or poor restorations in the oral cavity lead to scratching of the mucosa in the oral cavity, mucus and blood in the mouth can appear in the morning. 3. Oral hemangioma: If a hemangioma ruptures in the oral cavity, it can also cause mucus and blood in the mouth. Mucus and blood in the mouth early in the morning may also be other reasons, it is recommended to consult a doctor in a timely manner to clarify the cause of the disease, under the guidance of the doctor for standardized treatment.