Concern) Pain coming from the side and lower back when sitting

I wonder if the skeletal structure connecting the back and waist gradually collapses with age. Over time, whether sitting normally, working on the computer, sitting in a chair, or bending to pick something up, if I adopt a poor posture,

Starting from the right hip, the pain radiates up the lower back, and in severe cases, it even causes back pain.

I'm trying to sit properly and do a lot of balanced stretching to correct my posture.

After doing a little, my body feels refreshed, and the slight pain subsides.

 또 평소처럼 지내다 보면 나도 모르게. 의자에서 앉았다가 일어난다던지 앉아 있는 상태에서 옆구리가 아프고 허리 허리쪽으로 찌르기 시작하면서

It causes stiffness and pain, so I almost use patches. I apply two patches every week.

Sometimes I have to apply patches for two consecutive days every day to see any improvement, and if it gets worse, I rush to the hospital.

What could be wrong with the spine and lower back?

Sometimes, even when everything seems fine in everyday life.

My side and lower back are really painful.