Hi and Welcome to the forum, you might want to have a look at the following FAQ which explain where everything is
Welcome to Benefits and Work Yes, you need to explain to DWP exactly how/why you believe you should have scored points against the relevant descriptor/s.
Have a look at our PIP guide. It explains the process and the criteria against which you are being assessed.
PIP help for claimants I'm afraid MR's do not often do anything other than 'rubber stamp' the original decision, but we do have members who have been successful at this stage.
May I suggest that you bookmark/favourite this on your web browser now so that you can find it easily in future? This will allow you to return with further questions or comments about your PIP without having to start a new topic each time. We ask members to keep everything relating to the same claim in one topic as it helps us enormously - and I hope you will find it useful too