I had surgery twelve years ago and had my gallbladder removed. The incision in my belly button became infected. This  morning I woke up feeling nausous and there is a really smelly discharge coming from my belly button. When I bend over it pinches. Scared and nervous that there is something really wrong.
Thanks for your query at Chat Doctor! I suggest visit a surgeon and get the discharge collected in a swab and test for gram stain, bacterial aerobic/anaerobic culture and sensitivity testing done. Start the antibiotics based on the results. Smelly infections are due to \"anaerobic\" infections. You also need to get an ultrasound of abdomen done to see any collection of fluid and involvement of any internal organs. Kindly mention any other symptom you have? Take care.