The phenomenon of left throat and left ear discomfort may be caused by otitis media, tonsillitis or pharyngitis. 1. otitis media: due to viral or bacterial infection caused by inflammatory reaction of the mucosa of the middle ear cavity, which can lead to ear pain, ear stuffiness and hearing loss and other clinical symptoms, and due to the Eustachian tube pathway in the inflammation spreads to the throat, can also appear in the throat and the left ear uncomfortable phenomenon. 2. Tonsillitis: an infectious disease caused by a variety of pathogenic microbial infections, when the inflammation encroaches on the ear canal, the left side of the throat and the left ear will appear uncomfortable symptoms. 3. Pharyngolaryngitis: an inflammation of the mucous membrane, submucous membrane and lymphatic tissues of the pharynx, which can also cause the body to experience discomfort in the left throat and left ear, accompanied by symptoms such as dryness of the pharynx and difficulty in swallowing. If the above symptoms occur, it is recommended to actively seek medical attention to identify the cause of the disease.