Lomu has been forced to give up rugby
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Ex-All Black Jonah Lomu has suffered a setback in his battle against a potentially fatal kidney disease.
Lomu is now barely able to walk and has been forced to cancel a speaking tour in Britain because of the problems.
"The veins in his feet are struggling to cope with the blood flow," Lomu's manager Phil Kingsley-Jones told New Zealand newspaper the Sunday News.
"That has resulted in nerve problems in his feet and often means he has no feeling there."
Kingsley-Jones said the problems were caused by the dialysis treatment that 28-year-old Lomu is undergoing.
"He is not walking properly so doctors have to find out what is going on," he added.