Most earaches settle within 3-4 days and very few earaches benefit from antibiotics. In children, most ear aches are due to glue ear, a self limiting condition:

If pains are not settling, there is pus or blood from the ear, if fevers persist or pain is single sided or if your hearing is impaired, these are all good reasons to see a nurse practitioner or a doctor. Call 111 only if in severe pain.