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Intense cold can cause frostbite and hypothermia. Learn about first aid for cold exposure.

Learn what to do, and when to call 911, when someone is having a seizure.

With a migraine, you may have nausea and vomiting and be sensitive to light and sound. You may also have warning signs, such as flashing lights or loss of vision, before the pain starts. Cluster headaches recur in groups for days, weeks, or months.

A clear lens in the eye focuses light. This lets the eye see images sharply. With age, the lens slowly becomes cloudy. The cloudy lens is a cataract. A cataract scatters light and makes it hard for the eye to focus.

From sinus infections to conjunctivitis, a look at common problems caused by nasal allergies.

Read on for tips to help limit your exposure to pollen.

Exams of the feet and ankles make sure that your child's bones are growing correctly and that your child is walking correctly. This helps prevent some future foot problems. Learn about foot care for your child, including when your child may need foot care and when to call the doctor.

Some chemicals cause burns. Others may be absorbed through skin or lungs, causing hidden damage.

The right helmet and other safety equipment can protect the head when biking, in-line skating, roller-skating, or skateboarding. But they only protect if worn correctly. Here's a helmet safety checklist for parents to keep their kids safe.