Welcome to Healthcare Magic .Thanks for the query.
pain is commonly evident and the intensity of it varies from woman to woman but if its unbaerable there are other signs and symptoms of infection post surgery.If the is anything like urinary incontinence
,hot flushes ,bowel irregularity .vaginal discharge
or any unusual thing happening you should get it medically evaulated.
Hope good health for your mother .
feel free for any further help you need.