ضروري وبسرعة

toothache:
Toothache or tooth pain is caused when the nerve root of a tooth is irritated. Dental (tooth) infection, decay, injury, or loss of a tooth are the most common causes of dental pain. Pain may also occur after an extraction (tooth is pulled out). Pain sometimes originates from other areas and radiates to the jaw, thus appearing to be tooth pain. The most common areas include the jaw joint (temporomandibular joint or TMJ), ear pain, and even occasional heart problems.

bike safety:
Bike riding is a lot of fun, but accidents happen. The safest way to use your bike is for transportation, not play. Every year, about 300,000 kids go to the emergency department because of bike injuries, and at least 10,000 kids have injuries that require a few days in the hospital. Some of these injuries are so serious that children die, usually from head injuries.
A head injury can mean brain injury. That's why it's so important to wear your bike helmet. Wearing one doesn't mean you can be reckless, but a helmet will provide some protection for your face, head, and brain in case you fall down.

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