If your 2-year-old son is complaining of an earache that started with a fever two weeks ago, it would be advantageous to try nasal irrigation to see if it reduces the pressure in his ear. This can help if there is mucus buildup in the middle ear from the throat. It's common for children his age to have some nasal congestion at this time of year, so it's worth a try. Follow the instructions provided for nasal irrigation and do it at least three times a day for a few days. If there is no improvement after three days or if he develops a fever, it would be best to consult a doctor.