Baby poop very hard and dry means that the baby is constipated. There are two types of constipation in babies, one is functional constipation, food composition is not suitable, such as too much protein in food and not enough sugar, dietary fiber intake is not enough, dry stools lead to constipation. Long-term dietary deficiencies, food digestion, less stool in the intestines; malnutrition makes the abdominal and intestinal muscles thin, tension is weakened, peristalsis is weak, and stubborn constipation occurs. Due to irregular life and defecation, the formation of defecation reflex is weakened or not formed; less daily activities, intestinal peristalsis is weakened, intestinal muscle relaxation and constipation. This type of constipation can be cured after conditioning. The other type of constipation is organic constipation, which is due to gastrointestinal diseases (anorectal malformation, surgery or trauma, etc.), neurogenic diseases (congenital megacolon, spinal cord lesion, cerebral palsy, etc.), endocrine metabolic diseases (hypothyroidism, renal tubular acidosis, diabetes, etc.), food allergy and food intolerance, drugs, infection, poisoning and autoimmune diseases can also damage the gastrointestinal tract leading to constipation. For this type of constipation, the first step is to remove the cause, along with symptomatic treatment. The vast majority of babies with no stool for 4 days are functional. We adjust the following methods: 1, regular defecation: infants from 3 to 4 months can be trained to defecate regularly. Because the intestinal peristalsis accelerates after eating, often appear stool, so it is generally advisable to choose to let the child defecate after eating, to establish the conditioned reflex of stool, it can play a half-hearted effect. When defecating to focus on, it is best to 3-5 minutes to finish defecating, do not squatting pot for a long time or play while squatting pot. 2, adjust the baby’s diet: if the baby is breast-fed, due to insufficient breast milk constipation, for this constipation, as long as the amount of milk, constipation symptoms then relieved; if the baby is formula-fed more likely to constipation, which is most likely due to excessive casein content in milk, thus making the stool dry and hard. In this case, attention can be paid to the presence of milk allergy or milk intolerance. Children who can eat complementary foods, pay attention to adding coarse grains and fiber-rich vegetables (such as celery, leeks, potatoes, carrots, etc.) to their diet. 3, abdominal massage: massage with the palm of the hand in the direction of the colon, can be carried out before bedtime, once a day, 20-30 times each time, adhere to many days effective. 4.Medication: for fecal impaction, you can use open-cell laxative or saline bowel cleansing. Short-term stimulating laxatives can be used to lift the blockage. Laxatives include osmotic drugs (lactulose, sorbitol, polyethylene glycol), bulking agents (wheat bran, dietary fiber), intestinal dynamics (cisapride, erythromycin), lubricants (vegetable oil, liquid paraffin), stimulant drugs (senna, glycerin suppositories) five categories, the first three are preferred. 5, the application of probiotics: probiotics as a kind of beneficial flora from the external supplement, after entering the intestinal tract, will promptly adjust the balance of the intestinal flora, so that there is diarrhea, constipation and other symptoms to get better, and to some extent will increase the self-regulation function of the intestine. In short, the purpose of treatment is to remove the cause of the disease, improve the diet, restore the normal gastrointestinal transmission and discharge function, improve the fecal symptoms and restore the normal bowel habits.