is my back pain related to my UC?

So for the last 18 months or so I have had back pain. I get it whenever I stand up for too long - too long being as little as 30 minutes sometimes. It is worse quicker if I stand still. Sitting without enough support can also cause it.
My GP said it was probably muscular and did nothing. I didnt know I had UC then. In my consult the other day with the Gastroenterologist she asked if I had any arthritis or anything, which I said a little in my knees but I had assumed it was related to my lyme disease. I forgot to mention my back as I didnt really think of it as arthritis, but now I wonder.

It is mid way up my back, central on my spine. When it hurts it hurts A LOT. Sitting down still for half an hour takes the pain away. Till I stand again for too long.

So could this be related?

I can think of three potential contributors to back pain

1. The pain is caused by your colon inflammation/UC but it is manifested in your back
2. IBD related arthritis via general inflammation. Sometimes random parts of my body would hurt for no seemingly good reason
3. Axial arthritis - which can co-occur with IBD. This causes lower back pain and hip pain in the back.

Thanks everyone. I will mention it to my gastro when I see her next and also to my GP when I see her next. Hopefully one of them will figure it out whatever the cause. If it does turn out to be UC related then I'll report back.

I don't think anyone is ever going to be able to prove it. All your doctor can do is guess. I wouldn't take his word as gospel concerning this issue.