Tummy tuck wound: Tiny hole with an open "tunnel" next to it, pus under skin; Cleaning inside with saline with a syringe myself?

Full TT 5 wks ago, had a seroma aspirated 3 times, looks like it's gone now. 2 wks ago a tiny hole opened in the incision and drained orange clear fluid. Now it's changed to thicker yellow stuff. No smell. PS noticed the wound is open a bit underneath the thin top layer of skin next to the hole. Told me to clean the inside by squirting saline in the hole with a syringe daily myself. Strange? Not getting better yet and today a new tiny hole opened, I see a yellow dot in it like the other one:?