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Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.
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It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.