Tinnitus in the left ear may be suffering from suppurative otitis media, cerumen embolism, hypertension and other diseases, the specific causes still need to go to the hospital to determine the examination. 1. Suppurative otitis media: this disease is often caused by upper respiratory tract infection otitis media is usually caused by long-term excessive smoking, retrograde infection of the Eustachian tube pathway adenoid hypertrophy, etc. The main symptoms are hearing loss, ear pain, ear canal water, etc., and some patients will also have low-pitched or high-pitched tinnitus, and patients with serious conditions will also have high fever, vomiting and other systemic symptoms. 2. Cerumen embolism: cerumen embolism is mostly caused by poor cerumen excretion, long-term use of hearing aids, excessive cerumen secretion, etc. Those with incomplete obstruction of the external auditory canal usually have no obvious symptoms, and when the obstruction is serious, the patient will experience itching in the ear canal. When the cerumen swells in water, the patient will experience hearing loss, and when the cerumen is pressed against the tympanic membrane, the patient will experience tinnitus, and some of the patients will also experience reflexive coughing, Some patients also have reflex cough, stuffy feeling in the ear and other symptoms. 3. Hypertension: Hypertension is usually caused by excessive alcohol consumption, long-term mental stress, irregular life, physical activity, etc. The main symptoms are headache, arrhythmia, fatigue, etc. Some patients also have intracranial blood supply disorders, which are manifested as palpitations and tinnitus on one side. If there is tinnitus in the left ear, you can first observe for a period of time, if accompanied by other symptoms, you should promptly go to the hospital for a systematic examination of the doctor, after diagnosis and treatment as prescribed by the doctor.