If you have had a blocked ear for 3 weeks due to an ear infection, it is recommended to try a technique to help drain the accumulated fluid from your ear towards your throat. You can use a product like Otrivin™ to help open the canal that connects your ear and throat, known as the Eustachian tube. After applying Otrivin in your nose, you can try the Valsalva maneuver by pinching your nose, closing your mouth, and blowing while swallowing. If this technique does not resolve the issue within 2 days, it is best to consult a doctor who may prescribe a corticosteroid spray to reduce any swelling that may be blocking drainage.