how come some people's bodies stop wrist watches?

United States
June 15, 2010 9:49pm CST
my granny (RIP) and my cousin both cannot wear wrist watches because it will stop them.. what would cause that? is it something in their system messing up the battery?? i dont know if it happens with digital watches but i know the older fashioned ones they wont work.. do you know why? do you have the same problem or know some one that does?