If there is a dark red color of a blood vessel in the throat, the first thing to consider is that it is caused by local inflammatory stimuli. Various types of inflammatory factors lead to the stimulation of submucosal capillary dilation, congestion, may appear to the naked eye to see a blood vessel dark red. Common causes may be: chronic pharyngitis, chronic tonsillitis, laryngopharyngeal reflux, chronic sinusitis and other factors. 1. Patients with chronic pharyngitis may be stimulated by environmental factors, tobacco, alcohol, spicy diet stimulation and other factors, the mucosal capillaries in the throat may be stimulated by the above factors bleeding expansion, congestion. 2. Patients with chronic tonsillitis are prone to recurrent inflammation due to bacterial residues in the tonsils. Inflammatory mediators such as bacterial infection and other stimuli will then cause the pharynx to become red, swollen, congested, and the capillaries to dilate. 3. Laryngopharyngeal reflux, chronic sinusitis and other factors, gastric acid reflux stimulation or sinus secretion stimulation will cause inflammatory infection of the mucous membrane of the pharynx, redness, congestion, capillary dilatation and other manifestations. So if there is a dark red blood vessels in the throat, it is recommended to consult a doctor in time to clarify the specific cause, and if necessary, to carry out the appropriate treatment.