I had a tummy tuck 5 yrs ago. they put my belly button back. is it normal for my belly button to keep getting infected ?

No: It is not normal to keep getting reinfection.Get checked by your surgeon for any underlying cause.

No: Unless you have a piercing in your navel, which might get infected repeated, or repeatedly irritate it with rough cleaning with q-tips, your bellybutton should not be getting recurrent infections. Contact the surgeon or your pcp to be examined & have appropriate treatment provided. Are you diabetic? Do you take any meds that might lower your immune system (for lupus or ra, for example)?

Cyst or suture: Although delayed healing of the umbilicus is very common, once healed it will usually stay closed. Prolonged wound drainage may be an indication of a cyst or suture abscess for infection of permanent sutures used to repair the diastasis. If this does not respond to a course of antibiotics, removal of the suture could be a simple solution to your problem.

No: You probably have a permanent suture infection of one or two of the sutures that were used to make your tummy tight. Have your plastic surgeon look at this to get it removed.

Not normal: Assuming you are otherwise healthy, with no other major medical issues, the most likely causes are either a suture that is "spitting" and working it's way to the surface, or a small inclusion cyst. Your surgeon should be able to take care of either of these for you very easily.

Wound infection: It would be uncommon to have an infection persistent for 5 years. You should definitely followup with your surgeon. It could be a stitch but needs to be checked.