Hi Richard,
No need to inform DWP unless it will affect your benefit. Obviously at renewal time it its important to mention this.
However providing this is a long lasting condition and there is a possibility of an increased award, then you could notify DWP. This would almost certainly cause DWP to instigate a review.
I hope this helps.
LL26
Nothing on this board constitutes legal advice - always consult a professional about specific problems 
