Blockage of the left ear can occur in cerumen impaction, neurodeafness, secretory otitis media and so on. 1. Cerumen impaction: If there is cerumen impaction in the left ear canal, the ear may become stuffy. 2. Neurogenic deafness: If the blood supply to the inner ear is insufficient and the microcirculation in the inner ear is not good, a stuffy feeling in the left ear may occur. 3. Secretory otitis media: a large amount of secretion can be produced, manifested as negative pressure in the tympanic chamber, tympanic chamber effusion, which can produce a stuffy feeling in the ear. It is recommended to go to the regular hospital in a timely manner to the blocked left ear, clear the cause of the disease, standardized treatment under the guidance of the doctor, so as not to delay the condition of the body to bring adverse effects.