Why do I get bloated from drinking milk? Milk is a nutritious food, and bloating occurs when drinking milk, mainly because of the unique lactose contained in dairy products. When lactose enters the body, it needs to be decomposed, digested and absorbed by lactase secreted by the small intestine, but some people cannot digest and absorb lactose in milk well due to lack of lactase or low lactase activity, resulting in undigested and unabsorbed lactose entering the large intestine and then being fermented by bacteria in the intestine, producing gas and leading to bloating, and some patients may also experience diarrhea and abdominal pain. It is more common for yellow people to have milk bloating, so if there is a condition of lactose intolerance, which can lead to poor digestion and absorption of milk and bloating from drinking milk, it is recommended that you can use yogurt or do not drink milk on an empty stomach, drink a small amount of milk at a time to treat the symptoms, and if necessary, you can also take some probiotics to further improve bloating.