There are more reasons for a little blockage of the left ear, such as cerumen impaction, purulent otitis media, nasopharyngitis and so on. 1. Cerumen embolism: Cerumen embolism can be caused when there is excessive secretion or poor drainage in the left ear. In particular, oily cerumen secreted by cerumen glands can swell after bathing or when water enters the ear, thus compressing the ear canal and creating a sense of blockage in the ear. At the same time, it may be accompanied by tinnitus and hearing loss. 2. Suppurative otitis media: When upper respiratory tract infection or rhinitis or sinusitis occurs, it can cause suppurative otitis media. It leads to blockage in the left ear, accompanied by tinnitus, hearing loss and other manifestations. 3. Nasopharyngitis: Inflammation can spread upward causing swelling of the Eustachian tube mouth, resulting in the Eustachian tube can not be opened normally, so that the middle ear drum chamber produces negative pressure, resulting in the tympanic membrane invagination, so that the ears appear blocked. It is recommended that the patient actively consult a doctor to improve the examination to clarify the diagnosis.