Disease analysis: Hello! Constipation in the elderly refers to the decrease of defecation frequency and difficulty in defecation, mainly because with the increase of age, the food intake and physical activity of the elderly are obviously reduced, the digestive juice secreted by the gastrointestinal tract is reduced, the tension and peristalsis of the intestine are weakened, the muscles of the abdominal cavity and pelvic floor are weak, the sphincter of anus inside and outside is weakened, the gastrocolon reflex is weakened, and the rectal sensitivity is reduced, which makes the food stay in the intestine for too long and causes constipation due to excessive absorption of water. Guidance: It is suggested that the elderly should take Simo Decoction, develop the habit of regular defecation, pay attention to diet conditioning and physical exercise, especially functional constipation. Food should be rich in fiber and drink plenty of water.