Bad breath with a foreign body sensation in the throat is mainly considered to be related to tonsil stones, pharyngeal tumors, digestive system diseases and other factors. 1.Tonsil stones: refers to the inorganic salt deposits occurring in the tonsil crypts. The main symptoms are bad breath, which can be bad egg halitosis; foreign body sensation in the pharynx, sore throat and other symptoms. 2. Pharyngeal tumor: it can lead to obvious foreign body sensation and difficulty in swallowing. There may also be some secretions or exudates in the tumor site, which can cause bad breath after refluxing into the oral cavity. 3. Digestive system diseases: such as reflux esophagitis, dyspepsia and other diseases, gastric reflux into the upper gastrointestinal tract, can stimulate the esophagus and pharynx mucous membrane, and then there is a foreign body sensation in the throat and halitosis and other symptoms. If you have a foreign body sensation in your throat and bad breath, it is recommended that you consult a doctor in a timely manner to get a clear diagnosis and treatment.