The tympanic cavity is between the outer and inner ear, and a tympanic injection is the injection of medication into the cavity. It is mostly used to treat diseases such as secretory otitis media, sudden deafness and vertigo. The tympanic cavity is a small irregular air cavity within the pharynx of the temporal bone, the outer wall of which is the tympanic membrane, and the inner wall, which is the outer wall of the inner ear. A tympanic injection is performed by using a very fine needle so that it punctures the eardrum and then injects medication such as glucocorticoids into the tympanic cavity, where the medication can seep through the original membrane and into the inner ear to provide therapeutic effects. When patients with otitis media are treated with tympanic injections, the pus within the tympanic cavity can also be withdrawn. This treatment method is more commonly used in the clinic, and can be used to treat secretory otitis media, sudden deafness, vertigo and other diseases. When receiving tympanic injection treatment, you must be careful to go to the ear, nose and throat department of a regular hospital to receive treatment, so as to avoid complications such as infection and tympanic membrane perforation.