Seven and a half month old babies have some hard stools recently, which may be caused by drinking too little water, improper addition of complementary foods, constipation and other reasons. 1. Drinking too little water: formula-fed and breast-fed babies need to be fed water once between two breastfeedings to rehydrate the body, and if they drink too little water for a long period of time, it may cause dry and hard stools. It is recommended to increase the amount of drinking water appropriately. 2. Improper addition of complementary foods: seven months of the baby’s diet structure should also be breast milk or formula-based, a small amount of complementary foods, due to the baby’s gastrointestinal function is relatively weak, if the baby to add complementary foods too early, complementary foods are difficult to digest, or directly to the complementary food-based, which may lead to indigestion of the baby, dry and hard stools and other symptoms. Need to adjust the child’s diet. 3. constipation: seven and a half months baby stools some hard may also be caused by constipation, while some infants may also be accompanied by defecation difficulties, defecation frequency reduced and so on. Oral probiotics such as bacillus subtilis bacillus two live bacteria to regulate, can also be taken orally compound pepsin powder to help digestion, if necessary, can be used to ease the symptoms of Keseru. Seven and a half months baby hard stool, if the symptoms for a long time can not be relieved, should consult a doctor. The above medications should be used in accordance with medical advice.