A bad odor and unpleasant taste in the throat may be related to sinusitis, pharyngitis, gum stones, reflux esophagitis and so on. 1. Sinusitis: anaerobic bacterial infection can lead to nasal odor, and when inflammatory secretions flow down the throat, it can lead to halitosis. 2. Pharyngolaryngitis: manifested by pharyngeal mucosal congestion, lymphoid follicular hyperplasia in the posterior wall of the pharynx, which can produce inflammatory exudate, and the exudate is mostly foul-smelling. 3. Gingival calculus: mostly related to repeated retention of food residues, incomplete brushing, etc., after the appearance of calculus, it is often accompanied by bad breath and throat odor. 4. Reflux esophagitis: stomach acid, food debris and other stomach substances flow back into the esophagus, mostly accompanied by acid reflux, belching, can appear in the throat with a bad smell. It is recommended that people with bad throat odor go to the hospital in time to clarify the cause of the disease, and standardize the treatment under the guidance of the doctor to avoid delaying the condition.