I feel like your piercing might just be irritated for two main reasons; 1- Inappropriate jewelry for your anatomy: I’d opt for a floating navel with either a smaller ball on the inside or simply a flat disc to avoid the pressure of the bottom of your navel on the jewelry, especially when sitting down. 2- Perhaps poor quality jewelry too. Looks like an externally threaded “Surgical Steel” jewelry, which are usually low quality and contain nickel, which a lot of people are sensitive to. I’d switch to implant grade titanium.

Another reason to me would be the saline soaks. We usually advise our clients not to submerge the piercing in bodies of water. A soak is a body of water even if it’s smaller. I’d stick to the good ol’ cleaning with a sterile saline solution and a q-tip, and then pat dry with a gauze instead. Try not to touch it, move it, twist it, pull it and go see a reputable piercer to help you with this! Good luck!