Blocked ear: A common cause could be wax buildup. Getting water in the ear or a Qtip abrasion can cause an outer ear infection, so called swimmer's ear. This is very painful. If you have allergies, this can cause swelling of the eustachian tube and a blocked feeling. Additionally, fluid can build up in the middle ear. A middle ear infection is possible, but usually also quite painful. See ENT MD .
Answered 10/28/2020
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