My grandmother is 78 and about 2 months ago she started having one or two slight wetting accidents a week where she just didn't make it in time. Last week, she started having 10 or 12 severe wetting accidents a day. This has become a serious problem for us. She urinates when she stands up, but then doesn't go when she is on the toilet. Then, she will urinate on the floor as soon as she stands from the toilet. Is this common, medical, psychological? Any help would be greatly appreciated. Thank you.