If frank red blood is seen in the stool, or if the feces is black or contains pus, then medical consultation is recommended. Dehydration is evidence for consulting a physician and may require hospitalization. Signs and symptoms of dehydration in adults include thirst, reduced frequency of urination and/or dark color of urine, dry skin that loses its elasticity and remains in a pleat when pinched, fatigue, and light-headedness. In children, dehydration is noticed from the top down. First signs are the absence of tears when a child cries, the mouth and tongue become dry, urine flow and frequency is decreased. A child is considered dehydrated if it fails to urinate for a period of three hours. Other signs of dehydration include high fever, listlessness, and pleating up of skin after pinching.
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