Hi Vegas,
Numbness and burning in the toes can be symptomatic of diabetes and is something that needs to be checked out. The fact that it happens while you urinate is strange, and I'm not absolutely sure that they are inter-realated. Is this the only time that you get the pain, or do you get it other times while standing? Poor circulation is another cause, especially if you do or used to smoke. Liver and blood complications can cause burning or numbeness in the feet but it usually happens in both feet, not just one. You should see your doctor to rule out anything serious.
I hope this helps, if you have any further questions, feel free to ask, it costs nothing to click reply. If this has helped, please remember to click the green accept button.
Warmly,
Chase
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