Avoid emotional stress and insect bites in daily life. In the acute phase, rest in bed and avoid heavy physical work. If the patient is already bleeding from the gastrointestinal tract, daily care should be taken not to allow the patient to eat from the mouth again, and nutrition can be supplemented by fluids or other means. The patient should pay attention to the cold and warmth when travelling, and increase and decrease clothing appropriately. Try not to scratch with your hands during the illness to avoid skin damage and infection.