leafytree
Your post suggests that your limitations have increased recently.
You have in principle two options, however, both are dependant on your having had your new problems for at least three months.
You can still challenge the existing Decision providing it is not more than 13 months since it was made, however, you cannot include your new problems in challenge, they can only consider your health as it was when then the Decision was made.
You can report a Change of Circumstances, but be aware this will result in a full review of your claim, new claim form and almost certainly a face to face assessment.
To do this, write to the DWP office dealing with your claim, if you can send it using a tracked post so that you have proof of delivery.
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems 
