Will mixing milk with hot water cause diarrhea

Mixing milk with hot water generally does not directly cause diarrhea, but whether it causes discomfort depends on individual physical condition and operating methods. Lactose intolerance, sudden temperature changes that stimulate the gastrointestinal tract, bacterial contamination, protein denaturation, and excessive drinking are common influencing factors. Milk has a high lactose content, and some people may develop lactose intolerance due to a lack of lactase, manifested as bloating and diarrhea. After dilution with hot water, the lactose concentration decreases, which may alleviate symptoms but cannot be completely avoided. If unboiled raw water is used or stored improperly, it may introduce bacteria and cause intestinal infections. High temperatures may cause structural changes in milk proteins, and sensitive individuals may experience digestive discomfort. A large amount of fluid intake in a short period of time can accelerate intestinal peristalsis, especially when fasting, which is more likely to cause bowel movements. In special circumstances, if the milk is nearing its expiration date or stored improperly, heating may accelerate spoilage. Some people are sensitive to temperature, and alternating cold and hot stimulation may cause symptoms of irritable bowel syndrome. Infants, young children, and those with weak gastrointestinal function should carefully adjust the temperature of the milk to avoid exceeding 60 ℃, which can damage the nutritional content or burn the mouth. Boiling with clean water and cooling to the appropriate temperature before mixing is safer.

It is recommended to choose sterilized milk and ensure that the hot water is clean, controlling the mixing temperature between 40-50 ℃. Lactose intolerant individuals can choose low lactose milk and drink it in small portions. If persistent diarrhea occurs, it is necessary to investigate the possibility of food spoilage or pathogen infection, and seek medical attention if necessary. Pay attention to individual tolerance in daily life, avoid drinking in large quantities on an empty stomach, and use solid foods such as bread to slow down absorption rate.