Implanting a tiny light in the bladder blocks the signal that causes excessive urination.
Millions of people with poor bladder control could soon fix the problem with a touch of their smartphone.
Scientists have found switching on a tiny LED light in the bladder can block the nerve cells which cause people to urinate too often.
The light can be turned on using a smartphone, following a simple phone alert which lets someone know their bladder is overactive.
Around 14million people in Britain suffer from bladder control issues, which mostly affect the elderly and women who have had children.
Researchers have successfully tested a tiny LED lightbulb in rats, finding it returns their bladder to normal.