Ear wax is a normal substance meant to protect the ear from bacteria and trauma. However, too much ear wax can lead to ear infections, earaches, and even trouble hearing. To remove a buildup of ear wax, apply a few drops of hydrogen peroxide into each ear, one at a time. It’s helpful to lie down on your side, wait for the hydrogen peroxide to soak in, and then blot the ear with a tissue before switching to the other ear.
source: Extra Wellness
If an ear is causing you (or your child) immense pain or discomfort, you should consult with your doctor right away before trying any at-home solutions. However, hydrogen peroxide can be useful in many cases when dealing with a mild earache, infection, or buildup of ear wax.