Plugged ears or earwax blockage is usually a mild and temporary condition. The glands present in the ear canal produce a waxy substance called 'cerumen' (commonly known as 'earwax'). The wax protects the inner ear from dust, bacteria, fungi, insects, and water. If too much of earwax is produced, or if the wax is pushed too far into the ear canal, one may suffer from earwax blockage and/or pain in an ear.