Eustachian Tube Dysfunction occurs when the tube connecting the middle ear to the back of the throat becomes blocked or fails to open properly. This can lead to a feeling of fullness in the ear, discomfort, and difficulty hearing. It often results from allergies, colds, or sinus infections, which can cause inflammation and mucus buildup. Symptoms may include ear pain, popping sounds, or a sensation of pressure. Treatment options often involve decongestants, nasal sprays, or techniques to equalize ear pressure, such as swallowing or yawning. In some cases, medical intervention may be necessary to relieve persistent symptoms.