The Eustachian tube gets swollen shut (edema) or blocked by thick mucus. When this happens, air cannot get into the middle ear. The existing air in the ear gets absorbed by the body, creating a vacuum. This vacuum sucks the eardrum inward, causing that sensation of fullness, pressure, and hearing loss.
Seek medical attention from your doctor or an ear, nose, and throat (ENT) specialist. They can assess your symptoms and provide guidance on the best course of treatment. clogged ears after cold