The feeling of a foul odor in the throat may be related to lung infections, oral diseases, pharyngeal diseases, nasal diseases, so there is a certain relationship with the lungs. 1. Lung infections: for example, fungal or bacterial infections, lung abscesses can lead to a foul odor in the throat. 2. Oral diseases: such as oral ulcers, chronic periodontitis, malignant tumors of the oropharynx, can lead to a foul taste in the throat. 3. Pharyngeal diseases: for example, patients with tonsillitis, due to the tonsil surface has a lot of crypts food debris in the crypts fermentation, resulting in bacterial infection, will cause the throat feel a foul odor. 4. Nasal diseases: if the patient has rhinitis, sinusitis, especially fungal sinusitis, often can appear in the throat odor. There may be other reasons for the foul taste in the throat, we should go to the hospital in time, choose respiratory or stomatology, for a detailed examination, to determine the cause of the disease, under the guidance of the doctor for the cause of the treatment.