Buzzing in the left ear, clinically referred to as tinnitus, generally common are the following diseases: 1, neurogenic tinnitus, may be related to the inner ear blood supply, inner ear microcirculation is not good induced by neurogenic tinnitus, at the same time may be accompanied by hearing loss, ear stuffiness, vertigo and other manifestations; 2, tinnitus accompanied by secretory otitis media, the patient’s hearing will have a decline in the ear, ear stuffiness, earache and other manifestations, clinically do pure tone audiometer Conductive deafness, acoustic conductivity impedance map line shows B-type or C-type curve; 3, tinnitus induced by foreign bodies in the ear canal, common ear canal cerumen or ear canal flying insects and other stimulation of the tympanic membrane and the external auditory canal accompanied by tinnitus; 4, objective tinnitus, common arterial or venous tinnitus of the vasculature; 5, other diseases, such as tinnitus accompanied by abnormal opening of the Eustachian tube or tinnitus induced by auditory neuroma; 5, other diseases, such as the patient has abnormal opening of the Eustachian tube or tinnitus induced by the Eustachian tube. Tinnitus induced by acoustic neuroma.