Hello,
Your mother is a Diabetic and underwent
hip replacement surgery.
She is not very keen on diet restriction.
Now her incision site is infected.
Your mother would have developed infection due to
hyperglycemia or delayed
wound healing or any other surgical complications.
Diabetes are more prone for infections and easy spread due to uncontrolled blood sugar.
Containing the infection is also a challenge with them.
Infection and sepsis may cause vomiting.