Chronic low back pain that's rt above my butt in one area. it's a deep pain. when i have my son walk on my back, it feels good but then i start to get?

Could be muscular : There are a variety of possibilities. My first choice would be muscular. It could also be joint. It's too early to make a conclusion. We would need to know a lot more information. This is something you need to discuss with your physician and you may need x-rays or other imaging to help evaluate it. The physical evaluation may also clarify