Earwax, known as cerumen, naturally exists in the ears to control infections. However, when there's an excess due to changes in the ear's normal condition, it can lead to the formation of earplugs. This may cause symptoms like earache, a sensation of muffled ears, difficulty in hearing, and, in severe cases, even a high fever. A doctor or an Ear, Nose, and Throat (ENT) specialist can easily remove the earplug.