It always feels like something is moving in the ear, and this can happen. In clinical practice, it is mostly seen in the following cases: 1. Smaller pieces of cerumen, commonly known as earwax, or hair debris mistakenly enter the ear canal and are close to the eardrum. When moving or chewing, it rubs against the tympanic membrane to create the feeling of something moving. 2. Secretory otitis media. Most of them are complications after a cold that cause dysfunction of the eustachian tube, which means that there is fluid leaking out of the tympanic chamber. When the head position changes with respect to gravity, the relative flow of fluid causes a sensation. 3. Foreign bodies in the external ear canal. In particular, small foreign bodies such as mosquitoes and insects, especially live bodies, such as ants, small ladybugs and so on, are accidentally introduced.