Stomach distension in 1.5-year-old children may be caused by physiological factors such as over-eating, or pathological factors such as lactose intolerance; general treatment and medication such as probiotics can be taken. 1. Physiological factors: 1.5-year-old children have poor self-control, and when faced with favorite foods, they are prone to overeating and temporary stomach distension. You can burp after meals and move around appropriately. 2. Lactose intolerance: the incidence of lactose intolerance increases year by year with age, which can be manifested as bloating, etc. It is recommended to consume probiotics (e.g. Bacillus subtilis dictyostelium granules) or to replace it with low-lactose formula feeding under the guidance of a doctor to alleviate the symptoms. If 1.5 year old children’s stomach bloating cannot be relieved, they should actively seek medical advice to find the cause, and should not blindly use medication. Please follow your doctor’s instructions for the above medications.