My ear has been stuffed for the past 5 days. no pain, infection, or fever. what could be causing this?

Several possibilitie: . since there is no pain, it is unlikely (but not impossible) to be infection. It may be that you just have wax build-up, which may need to be removed. Another possibility is something called Eustacian Tube Dysfunction-which occurs when you are unable to equalize air pressure in the ear (think of how your hearing changes when in an airplane). In adults, this is often due to problems with the nose