Odd Back Tightness

For a little while I’ve felt kind of tight in my lower back on the right side, just where my back meets my ass. It doesn’t bother me too much except if I sleep funny or lean to one side for a while for whatever reason.

In addition, since ME Lower day last week I have a ball of soreness on the left side of my back right below my ribcage that I feel if I put any stress on the back there.

What could this be? Is this a problem? How would I remedy it?

If it is your lower back then seek medical attention!

The thing is there’s no sharp pain anywhere, it’s just tightness and soreness

Looked it up, yeah it looks like you identified it right given the location. Should I try to stretch it or something? Any ideas on how?