Tinnitus in the left ear can be seen in cerumen impaction in the left ear, secretory otitis media in the left ear, temporomandibular arthritis, etc. It can be treated by removing cerumen, medication, heat treatment and physiotherapy for specific diseases. 1. Cerumen embolism: consult a doctor in time and use cerumen hook to remove the cerumen directly with the help of a doctor. If the cerumen is hard, use sodium bicarbonate solution to soften the cerumen and then flush the cerumen out of the external auditory canal with water. 2. Secretory otitis media: In the acute stage, use antibiotics as early as possible, commonly used such as cefradine, etc., to control the infection and inflammation in time. For those with nasal congestion symptoms, ephedrine can be used to spray the nose to contract the nasal mucosa, but attention should be paid to the frequency of use of time to avoid drug rhinitis. 3. Temporomandibular arthritis: it can cause redness, swelling and pain of joints, which can be relieved by local hot compresses and physiotherapy. In addition, pay attention to not eat too hard food, avoid chewing gum. It is recommended that patients seek timely medical attention to determine the cause of tinnitus, and then treat the disease under the guidance of the doctor.