Hey Anon, you mentioned "lower part of your body" last bread. Sounds a bit like Sciatic Nerve to me.
The sciatic nerve is the longest nerve in your body. It starts in your lower back and splits to run through your hips, buttocks, legs, and feet on both sides. Bone spurs and spinal stenosis (narrowing) can also put pressure on the sciatic nerve in the lower back. When that happens, it can cause a lot of problems all the way down the nerve. The most distinctive sign of sciatica is pain that radiates from your lower back into the back or side or your legs. It can range from a mild ache to sharp, severe pain. You can also get numbness, tingling, and weakness in your leg or foot.
https://www.webmd.com/back-pain/what-is-sciatica