If nothing has changed will it go against you if you say that but include a hospital letter to say you still are under their care and give details of condition and medication. I have done a review in the past said nothing changed and they removed awards
I would have a look at the Guide to PIP Claims & Reviews - from page 128. We don't advise that people just tick - 'no change'. Sometimes, that works, but as you've found, they can then remove awards. You don't have to write reams, but it would help if you write what hasn't changed in respect of the PIP criteria. The letter you have is good, and you should definitely include it.