Hello Christian and I am really pleased that your arthritis is getting better.
Everyone has an obligation to inform the DWP if their condition significantly changes and failure to do that could result in an overpayment and all the pain that can involve.
However, whether your condition has changed significantly enough to go down that route is beyond the scope of this forum and I would suggest that you seek personal advice from a local advice agency. They may also be able to support/guide you through the process.
Hoping your other conditions are not spoiling your enjoyment of your ne found mobility.
Catherine
Nothing on this board constitutes legal advice - always consult a professional about specific problems 
