As temperatures begin to cool, American put away their flip-flops and look for warmer footgear. But ill-fitting or inappropriate winter boots can cause problems ranging from bunions to broken bones. Pointy toes can cause foot neuromas and slippery soles can cause dangerous falls.

Many people don't realize that feet expand or swell throughout the day. To find the right boots, measure feet in the evening when feet swell to their largest size and while standing. Since feet are often uneven in size, boot-buyers should choose sizes based on their larger foot.

According to the American Podiatric Medical Association, 65 percent of American women ages 18 to 49 haven't measured their feet in five years, meaning that they most likely wear ill-fitting boots.

The APMA offers these tips for those looking to buy the safest winter boot:

•Choose boots designed for stability. High stilettos might make a statement but can prove treacherous on slick ground. Many fashion boots aren't designed for winter walking.

Look for boots with solid heels. Low wedges, especially those made of cork, aid shock absorption and provide strong foottoground contact.

Also make sure the boot has traction on the bottom of the shoe so the walker doesn't slip and fall.

•Make sure boots fit well. For those who wear thick socks all winter, wear them while trying on boots. Walk around the store wearing the boots on both feet.

Don't purchase boots that must be broken in. Boots, like shoes, should immediately feel comfortable. Choose boots that support the ankle.

•Don't cramp the toes. Pointytoed shoes can pinch feet, leading to calluses and deformities such as ingrown toenails, hammertoes and bunions. For safer walking, choose rounded or square toes that allow