Suddenly feeling that the ear is blocked and stuffy may be caused by cerumen impaction, acute diffuse otitis externa, etc. Different treatment measures can be adopted respectively, such as using therapeutic ear drops and cleaning the ear canal to improve the symptoms. 1. Cerumen impaction: If there is excessive cerumen secretion and poor drainage, forming cerumen impaction, you will suddenly feel your ears are blocked and stuffy. You can use ear drops, such as sodium bicarbonate solution to fully soften the cerumen, and then rinse and clean the ear canals with warm saline under the guidance of a professional doctor. 2. Acute diffuse otitis externa: often caused by bacterial infection of the ear canal skin edema, increased secretion, suddenly feel the ear blocked stuffy, should cooperate with the professional doctor for medication, such as levofloxacin, etc., to control the inflammation, improve the internal environment of the ear canal, so that the ear back to normal. Suddenly feel the ear blocked stuffy, it is recommended to go to the regular hospital as soon as possible to consult the examination, clear diagnosis, follow the doctor’s instructions standardized medication and treatment.