If bright red blood appears occasionally, it is normal, mainly because the mucous membrane of the throat is in a long-term inflammatory state and the blood vessels are more filled, which can lead to blood vessel rupture and bleeding symptoms when coughing frequently or eating dry and hard food. If it occurs repeatedly and is dominated by dark red blood, it is necessary to be alert to malignant tumors. Improve laryngoscopy as well as esophagus-related examination, because early tumors in the hypopharynx and early tumors in the upper esophagus are also dominated by foreign body sensation in the throat. When the surface of the tumor breaks down, repeated bleeding can occur, and in severe cases, neck mass and severe pain in the throat can occur. If abnormal masses are found by laryngoscopy, biopsy should be completed as soon as possible to clarify the pathological nature and specific treatment according to the results.