Sleeping and drooling with blood is mostly seen in gingivitis, periodontitis, and may also be caused by nasopharyngeal diseases. Gingivitis or periodontitis triggers bleeding gums, and unconscious drooling with blood during sleep. There is tartar or soft tartar around the teeth, and the gums are irritated for a long time, which triggers bleeding. The symptoms can be relieved by scaling and medication. Tumors in the throat, chronic pharyngitis or nasal bleeding can also appear in the phenomenon of sleep drooling with blood, need to treat the symptoms of nasopharyngeal pathogenesis can only be relieved. Therefore, sleep drooling is usually gingivitis, periodontitis, nasopharyngeal diseases, but other diseases can not be excluded, it is recommended to go to the stomatology department or otorhinolaryngology department for medical treatment.