Thank you for the query.
Your pain can be caused by umbilical hernia
(if the surgery was done laparoscopically) or urinary tract infection
. This is not the part of healing process. Sometimes fluid accumulation around the navel can cause such symptoms as well. The skin becomes tender and painful in this area.
You should have abdominal ultrasound
performed, urine analysis and blood work done.
Hope this will help.