Tribunal day next Tuesday.

I'm finally getting my tribunal on Tuesday after it being delayed twice.

There is one health condition I have that normally only effects me over winter and some times into spring. It was put on my original claim but as they said it effects me less than half the time I didn't argue their decision on that problem.

The thing is, this year it's not stopped. I fractured my spine 25 years ago and I get sciatica during the cooler months but I'm still suffering it now. Is it something that I can bring up in the tribunal if I didn't argue against it in the tribunal application, considering that it is in the original pip application?

Thanks.