9 Reasons Flip-Flops Are Bad For Your Health

They may be comfortable, but they're also really bad for you

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As the weather warms up, it's hard to resist the urge to break out the truest sign of summer: flip-flops. But most experts are horrified by the idea. Here's why you should reserve your flip-flops for the beach, pool, spa, and shared showers — and keep your feet out of them, otherwise, according to Dr. Jackie Sutera, DPM, a podiatrist and spokesperson for the American Podiatric Medical Association.

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1. They expose your feet to bacterial, viral, and fungal infections

Any time your feet get particularly filthy (i.e., any time you wear your flip-flops in public), they're likely covered in some nasty things likes Staphylococcus, a bacteria that can irritate the skin on your foot in the best case or lead to amputation in the worst-case scenarios. (It depends on whether you have open wounds, like microwounds from exfoliation during a recent pedicure, or actual cuts, and your state of health when you pick up the bacteria.)Athlete's foot, an itchy fungal infection that's highly contagious, is spread by contact with something that's contaminated. When you wander around nearly barefoot, you're screwed if this fungus crosses your path. And the same goes for the virus that causes warts, human papillomavirus (HPV).

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2. They slow you down

An Auburn University study found that flip-flop wearers take smaller steps than people who wear sneakers.

3. They make you extra clumsy

Those short strides you take when you wear flip-flops? They increase your risk of tripping.

4. They destroy your heels

Because your heels hit the ground with more force when there's nothing but a measly piece of foam separating your foot from the ground, walking in flip-flops accentuates the heel-strike impact, which could end up causing pain – especially if you stand or walk in them for extended periods of time. When a thin strap is the only thing that holds your shoe on, that strap rubs up against your skin every time you take a step. This can cause irritation and blisters. When blisters pop, you're left with an open wound that makes you more vulnerable to the pathogens you pick up anytime your foot is exposed.

5. They can permanently damage your toes

Ever hear of hammertoe? It's when the knuckles of your toes bend. When you wear flip-flops, your toes need to work extra hard to keep the shoe on your foot, which can cause hammertoe over time. If you want to avoid stiffness, pain, and potentially, surgery, you'll stick with strappier sandals (ideally, a pair with a thick strap at the midfoot, and one that goes behind your ankle). Think Birkenstocks and Tevas, which — just your luck! — happen to be trendier than flip-flops.

6. They mess with your posture

Any super-flat shoe that doesn't bend like your foot does when you walk barefoot alters your biomechanics and affects posture.

7. They can cause shooting pains

People with flat feet need arch support to keep their knees, hips, and back aligned. In a flat shoe, there's none of that, so your joints have to compensate. This can cause overuse injuries all the way up the body, including Achilles tendonitis (an injury to the tendon that connects the calf muscle to the heel bone), heel pain, and pinched nerves in the back.

8. They can exasperate bunions

Because your toes have to work so hard to keep flip-flops on your feet, over-gripping can aggravate people with unsightly and painful bunions, a bump at the big toe joint. Not good.

9. They could be made of toxic materials

Plastic straps may be made of latex, which many people are allergic to, or plastic that contains BPA, a toxin linked to various cancers. Do you really want your toes to get all up in that? Opt for sandals with fabric or leather straps, because natural materials tend to be safer.Still feel like such a flip-flop day? (Didn't think so.)

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