First, there are changes in mood and temperament. Healthy children are always full of energy, with bright eyes, and they don't cry or make a fuss without reason. If a child is restless, has a red face, and dry lips, these are often signs of fever; if the child has a呆滞gaze, stares straight ahead with both eyes, and clenches fists, these are usually precursors to convulsions; bent legs, paroxysmal crying, and rolling around indicate abdominal pain.