What can I do to get the belly button keloid removed? I prefer not to get a shot or surgery (Photo)

Hidef protocols can help with keloid and hypertrophic scars on the face and body. Surgery is often not needed if lasers are introduced. 
In our office, we combine treatments starting with topical pre-conditioning of the scars with Plato's Scar Serum for hypertrophy and Melarase PM for pigmentation. Fractional RF, laser, and micro fractional RF can help limit scar growth. Kenalog IIT can also help reduce scar thickness. 
Best, 
Dr. Karamanoukian
Realself100 Surgeon

I would discontinue using the tea tree oil as it may continue to agitate the tissue and piercing, and would instead utilize saline salt soaks to relieve the skin. I would avoid touching the piercing and area as well. If the swelling persists, I would consider removing the piercing and allowing the healing bump to dissipate on its own. If a scar persists afterward, I would then seek a board-certified expert to inject ketorolac into the tissue to minimize its size. In the meantime, I would recommend that you follow up with an APP piercer in your area, then seek a board-certified expert if it does not resolve. 
Best of luck, 
Kian Karimi MD, FACS