It is clinically known as “stuffy ear”. Possible causes include the following: 1) blockage of the external ear canal or the surface of the eardrum by secretions or cerumen; 2) middle ear pathology, such as secretory otitis media; 3) certain types of sudden deafness, which first have stuffy ear as the main clinical symptom. Therefore, it is recommended to seek medical attention promptly when a sensation of ear congestion occurs. Through physical examination and examination, the cause of the stuffy ear sensation can be clarified, and then treatment can be carried out according to the different causes.