Oranges should not be eaten before meals or on an empty stomach. Organic acids in oranges can stimulate gastric mucosa. Eating oranges before meals or on an empty stomach is not good for your stomach. Elderly people with deficiency of stomach, kidney and lung should not eat more, so as not to induce abdominal pain, soreness of waist and knees and other symptoms. Some children will get angry if they eat too many oranges, and some children will get angry if they eat too many oranges, such as glossitis, periodontitis and pharyngitis.