Frequent spitting with blood, if it is periodontitis caused by the need to go to the stomatology department, if it is caused by pharyngolaryngitis need to go to the otolaryngology department, if it is caused by digestive diseases need to go to the gastroenterology department, the specific department should be combined with the other manifestations to determine. 1. Periodontitis: When periodontitis occurs, the gums may bleed after being stimulated, such as brushing teeth, biting hard objects, etc. In severe cases, spontaneous bleeding may occur, so the patient should go to the stomatology department for perfect periodontal treatment, including supragingival cleaning and subgingival scraping. 2. Pharyngitis: Pharyngitis may lead to bleeding in the throat, accompanied by discomfort and pain in the throat, etc. Laryngoscopy should be carried out in otorhinolaryngology, and local medication, such as gargling with cotrimoxazole solution and cotrimoxazole gargle, can be carried out after the diagnosis is clear. 3. Digestive system diseases: such as reflux esophagitis, may lead to upper gastrointestinal bleeding, at the same time will be manifested as burning pain behind the sternum, epigastric discomfort, need to go to the gastroenterology department for consultation, through the gastroscopy examination to clarify the diagnosis, can be taken to the treatment of omeprazole, omeprazole and so on. All of the above medications should be used under the guidance of a doctor. There may be other reasons for blood in the saliva, so it is recommended to go to the hospital in time to receive targeted treatment as early as possible.