When small insects fly into the ear, go to a darker space and shine light on the external ear canal to lure the flying insects out by using their phototropism. If this is not successful, you can fill the external ear canal with cooking oil at home. For one thing, this will stick to the flying insects and limit their activities to avoid damaging the external ear canal and the eardrum. Secondly, they can be drowned to facilitate their removal. If this is not successful, then you need to go to a hospital for examination and treatment. You can give 1% dicaine to fill the external ear canal, anesthetize the flying insects, and then use a wheat grain clamp or an attractor to suck them out when they are not active. At the same time, depending on the condition of the external ear canal and tympanic membrane, antibiotic treatment can be given to prevent infection, such as cefprozil.