Flat flip-flops may be fashionable, but they are not as sensible and safe as some people may think, experts warn.
Flip-flops can increase the risk of a number of foot problems
The shock of moving from heels to flats, extra pressure on the heel of the foot and blisters from the thong on the flip-flops are among the problems.
Those who wear flip-flops for more than just the beach risk accidents caused them slipping off, they add.
The Society of Chiropodists and Podiatrists recommends a sandal with a slight heel and more support instead.
The flatness of flip-flops is the main problem with the shoe, the experts say.
People used to wearing a shoe with a bit of a heel may find their Achilles' tendons feel tender when they swap to flip-flops.
They may also feel a tight pull either at the back of their calves or under their feet.
Having to grip the flip-flop by clenching the toes can lead to arch strain and pains - which can also be caused by the footwear's lack of support.
The society warns that wearing flip-flops while driving could potentially be even more dangerous, as the shoes could move and become entangled with the car pedals.
It adds that people wearing flip-flops may also experience pain in the heel caused by plantar fasciitis - chronic inflammation of the connective tissue extending from the heel bone to the toes.
Mike O'Neil, a podiatrist at the Princess Margaret Hospital in Windsor, said: "Heel pain is very common - we probably see four or five new cases here every week - and we also see inner arch collapses.
"And podiatrists see lots of broken and fractured toes from flip-flops.
Mr O'Neil, who is a spokesman for the Society of Chiropodists and Podiatrists, recommended footwear with more support, such as trainer sandals.