Earache is a pain or pressure within the ear that is causing the person pain. Earache can be due to infection, sinus issues, cold symptoms, damage to the ear or having a small foreign object in the ear (eg: children putting things in). Earache can be in one ear or both ears. Should the pain last more than three days, then it is important to have a GP or nurse assess the ear.
Yoga postures and breathing techniques can of course help here, though it is important to listen to your body and adjust yourself accordingly. Should the pain or pressure worsen, please ease of the technique and/or seek professional help as mentioned. Sometimes yoga and deep breathing techniques can push through blockages with the energy of the body, and in the physical body itself. Practicing the yoga postures here with Ujjayi breathing could possibly release or ease pain/pressure.