Unilateral ear congestion can be treated by pinching the nose, shutting up, and puffing, or by strengthening swallowing movements, gagging, or chewing gum, all of which can alleviate transient, episodic unilateral ear occlusion. However, if the congestion persists, you should go to the hospital for an examination. It may be caused by a secretory otitis media caused by an upper respiratory tract infection, or even a middle ear effusion, or it may be caused by cerumen embolism or a foreign body entering the ear. The most serious case is due to a tumor in the nasopharynx or a tumor growing around the eustachian tube, resulting in this unilateral ear stuffiness, so it is important to go to the hospital in a timely manner.