Compared to high heels, flip-flops don't even look remotely hazardous. But experts are warning of the dangers of their prolonged use such as the risk of shin splints and joint pains.

Frequent complaints include twisted ankles, but some have broken their arms or wrists after falling because their flip-flops caught on uneven ground, a Daily Mail report says.

Experts say flip-flops force people to change the way they walk so that when taking a stride they put pressure on the outside of their foot, rather than their heel, causing long-term damage. And there is also the risk of serious injury from tripping over.

Many also suffer aching toes as they constantly scrunch them up, while there is also the danger of the odd stubbed toe.

Flip-flops are one of the most popular shoes among women, with 15 million wearing them every day in summer, according to shoe firm MBT in Britain which obtained the figures.

Mike O'Neill, spokesman for the Society of Chiropodists and Podiatrists, Britain, warned of the damage.

'The lack of support of the flip-flop also causes pain in the tendons on the inside of the foot and lower leg. It can also lead to shin splints,' he said.

Medics say flip-flops are just as bad for the feet as stilettoes but cause far more damage as they are worn for longer periods of time.