First aid mastery depends on knowing CPR techniques, recognizing heat stroke symptoms, and implementing structured rehabilitation for fractures and sprains.
Foot sprains of the ankle ligaments are common, with about 25,000 occurring each day, according to the the American Academy of Orthopaedic Surgeons. Sprains usually result from the ankle turning inward. Tears in ligaments are known as sprains, while tears in muscle are called strains.
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Neck pain is a common complaint; over 50 percent of people complain of neck pain during the course of a year, according to the University of Illinois at Urbana-Champaign's McKinley Health Center. Ligaments attach bone to bone; stretching the ligaments too far or tearing them causes pain.
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Overexposure to temperatures below 32 degrees F can result in frostbite, frozen skin and tissue in areas of cold exposure. Fingers are a common site for frostbite, because blood vessels farthest from the heart constrict in cold weather to conserve blood for major organs.
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