PIP Review.

I wonder if anybody can offer any advice....

I have recently received a PIP Review form to fill in. I am unclear about whether I have to repeat things that I originally explained in my initial claim. It asks about changes so if there have not been any, is it better to just put 'No change' or should I explain all of the difficulties that I still have? The problem is that I have so much to put as I have several conditions.

Any advice would be gratefully received.