The possible reasons for the constant cicadas sound in the ear include ear diseases, systemic diseases and psychological factors. 1. Ear diseases: Congestion of tympanic membrane caused by cerumen impaction, non-purulent and purulent otitis media may occur, and may improve after cerumen removal, anti-infection and other treatments. 2. Systemic diseases: blood pressure is too high or too low, arteriosclerosis, anemia, etc. cause blood circulation in the inner ear and appear. 3. Psychological factors: due to work pressure, anxiety, etc. can also cause. There may be other reasons for the constant cicadas sound in the ear, such as sleep disorders, menopause, etc. If the improvement is not obvious in a short period of time, you should go to the hospital in time, and the doctor will judge the specific cause of the disease according to the symptoms, signs and auxiliary examinations.