Ear barotrauma is discomfort or damage to the ear caused by pressure differences between the inside and outside of the eardrum. It occurs when the Eustachian tube becomes blocked, preventing equalization of pressure changes that happen with altitude changes like flying or scuba diving. Symptoms include ear pain, fullness, bleeding, and hearing loss. Treatment involves relieving nasal congestion to open the Eustachian tube through decongestants, yawning, chewing gum, or ear tubes inserted during surgery for chronic cases. Preventive measures consist of descending slowly, breathing exercises, and avoiding earplugs during pressure changes.