Hi rosie08
PIP is not awarded because of the condition but rather the limitations that result and prevent a claimant from completing a range of everyday activities. Having B12 injections will not necessary help you get the higher mobility rate.
Have a look at our PIP Claim guide for a better understanding of the criteria you will need to meet.
www.benefitsandwork.co.uk/help-for-claimants/pip If you have any further questions, then please return to the forum.
Gary