Hi, and thanks for your medical question on eHealth forum!
Discharge from umbilicus or navel or belly button could be due to fistula, boil, infection or in women due to endometriosis. Umbilical fistulas are narrow tubes connecting the outer skin with anything inside like intestine, mesentry etc. Boils in the umbilicus can also burst and release blood and pus. In rare cases it could be Meckelâs diverticulum.
Do consult your doctor. A swab test of the sticky discharge should be done and culture and sensitivity tested to start appropriate treatment. Diabetes should be tested for as this may cause infection to linger. At times colored X-rays are taken after injecting dye to know if there is a fistula.
Meanwhile clean with local antiseptic solution and keep the area dry. Hope this helps. Take care!