Thank you for your query.
1. It is unusual for such severe pain
after four days (I assume). Get her examined immediately.
2. Causes for severe pain are excessive dissection, prolonged surgery, cauterisation, ligatures, infection and so on. Does she have fever? What pain medication is she on? Is she on a medicated gargle?
3. Her ear pain
is probably referred pain
from the throat and nasopharynx