There are two common causes of nausea, dry vomiting, and blood when brushing teeth in the morning. In one case, the patient’s own pharyngeal reflex is sensitive, and dry vomiting occurs when stimulated. After the intense nausea, it tends to break the mucous membrane of the throat and bleeding occurs. Generally speaking, the problem is not serious and does not require medication. In another case, people with chronic pharyngitis, the mucous membrane of the throat is stimulated by inflammation and is relatively sensitive, which can easily cause nausea when brushing teeth, accompanied by dryness, itching, and irritating cough. Because the capillaries under the mucosa become more brittle after inflammatory stimulation, the process of nausea may lead to the rupture of small blood vessels and cause bleeding. In terms of treatment, the main thing is to use Chinese herbs to clear the pharynx and throat, and then you can use anti-inflammatory oral tablets with it. Keep the oral hygiene and do not eat spicy and stimulating food.