If you feel that one side of your ear is blocked, consider the following: 1. middle ear infection and inflammation of the external ear canal. If the ear canal and tympanic membrane are inflamed, most of them will be accompanied by ear pain and even fever, and the ear canal and tympanic membrane will be congested and swollen, causing hearing loss. The treatment can be done with anti-inflammatory drugs and ear drops, or even pro-discharge drugs. 2. cerumen embolism in the ear canal, cerumen is earwax, if there is a large piece of cerumen in the ear after water, the cerumen will be soaked and swollen, softened and pressed against the eardrum, or when pulling out the ear, the cerumen will be pushed deep into the ear canal and pressed against the eardrum, causing the feeling of blocked ears. You can go to the hospital and remove it with the help of a doctor, and the swelling and pain in the ear will disappear.3. Swelling and stuffiness in the ear canal and middle ear cavity, such as external ear canal cholesteatoma, cerumen adenoma or cholesteatoma in the middle ear cavity, mostly need surgery.4. Neurological deafness, if there is no problem with the ear canal and eardrum, you should consider the swelling and stuffiness in the ear caused by secretory otitis media or neurological deafness, and you need to perform electrical audiometry and acoustic conduction resistance examination The diagnosis should be confirmed. If the ear swelling and stuffiness is caused by neurological deafness, you can use hormones and nerve-nourishing and vasodilating drugs, such as Ginnado or methylcobalamin, to treat it.