Patients with pneumonia need to drink more water, because pneumonia is often combined with fever and other symptoms. Drinking more water can replenish the water lost due to fever to prevent dehydration, which also plays a role in reducing fever. Patients with fever can put salt and sugar in the water to replenish their electrolytes. The patient’s digestive function is poor in pneumonia, so drinking more water can clear the intestinal tract and facilitate bowel movements.