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  1. WebMD is a trusted source of health and medical information, with expert reviews, community support, and educational services. Find a doctor near you or browse health news.

  2. Empty nose syndrome is a rare complication of nasal surgery. It can make it hard for you to breathe properly, and it can cause headaches and nosebleeds. Household Pests: Moths. Moths sometimes ...

  3. 2023年9月25日 · 15 /15. An Australian study says people with light-colored eyes are twice as likely to get age-related macular degeneration. That's because less UV light is being absorbed by the iris, so more can ...

  4. 2024年3月10日 · ADHD is the most commonly diagnosed mental disorder in children. Find out the symptoms in children and adults, types, causes, diagnosis, treatment, and outlook.

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    Normal body temperature averages 98.6 degrees. With hypothermia, core temperature drops below 95 degrees. In severe hypothermia, core body temperature can drop to 82 degrees or lower.

    During exposure to cold temperatures, most heat loss -- up to 90% -- escapes through your skin; the rest, you exhale from your lungs. Heat loss through the skin happens primarily through radiation and speeds up when skin is exposed to wind or moisture. If cold exposure is due to being immersed in cold water, heat loss can occur 25 times faster than...

    The hypothalamus, the brain's temperature-control center, works to raise body temperature by triggering processes that heat and cool the body. During cold temperature exposure, shivering is a protective response to produce heat through muscle activity. In another heat-preserving response -- called vasoconstriction -- blood vessels temporarily narro...

    Normally, the activity of the heart and liver produce most of your body heat. But as core body temperature cools, these organs produce less heat, in essence causing a protective \"shut down\" to preserve heat and protect the brain. Low body temperature can slow brain activity, breathing, and heart rate.

    Confusion and fatigue can set in, hampering a person's ability to understand what's happening and make intelligent choices to get to safety.

  5. 2023年9月27日 · Pale skin. Vomit that is bloody, black, or looks like coffee grounds. Serious, sharp stomach pain. An H. pylori infection is also a risk factor for stomach cancer, which has few symptoms at first ...

  6. 2024年3月20日 · The classic symptoms of appendicitis include: Pain in your lower right belly or pain near your navel that moves lower. This is usually the first sign. The appendix pain location might be different ...