If you have darker skin you can make it look like a hollow in a tree in a forest. Start with ink close to your skin color that gets a bit darker and then lighter to make a hollow effect with the scar in the middle. Then have one tree or a whole forest surround the hollow. The hollow could be in a trunk of a tree, it if you have really dark skin it could just be a dark area in the forest.

If you have light skin you can do a space rift. Have pink ink surround the scar and turn into bright pink, red, yellow, and orange to look like a glowing schism in space. surround it with a starry space scene.

If you have light or medium skin you could have it be an inside of a flower. I’m terrible with plant species, but there are some nice tall flowers with pink insides and vibrant outsides.

These are just a few ideas. I hope they help. I also hope your surgeries are successful, and that you are feeling better soon. Stay strong. And whatever tattoo you get I’m sure it will look great.