Why Do I Have an Odor with a Yellowish Discharge Draining in my Belly Button 3 Weeks Post Op from a Full Tummy Tuck? (photo)

It is not uncommon to have a little bit of drainage from the belly three weeks after your tummy tuck.  Usually this is because part of your belly button is taking longer to heal after the stress of surgery.  The key things to look for are increasing redness, pain, swelling, fevers or chills.  If you have any of those notify your plastic surgeon immediately.  If not, I would let him or her know about the drainage so that they can make sure it is not something more worrisome.  Good luck.

The belly button (umbilicus) can sometimes show delayed healing because of reduced blood supply.

This results in drainage which can be malodorous.

I usually recommend showering with chlorhexidine cleanser (Hibitane and the like) and application of an antibiotic cream such as fucidin.

The other possible factor would be a suture. This can cause drainage until it dissolves or is removed.

See your surgeon for a check.

All the best.

Either silver nitrate treatment to area, or re operation to remove the "nidus" of the drainage/infection.