I also have the sun symbol tattoo, only mine is about an inch wide on my hand between my thumb and index finger. I guess that is what you intended it as since you have knot work. I know Native americans also used it as a medicine wheel.
I like the ink, I have plenty of my own, But - Ow! That's gotta hurt more than usual. I have things on my chest & I know how the nipples feel. That is just a little close. Nice work though, very clean lines (I am picky), and the shading is well done too. Nice!