1. It may still be caused by gastroenteritis. The treatment mainly lies in the usual aftercare, regular diet, and less stimulating drinks such as fat, high sugar, spicy and fried food and coffee.

Suggestions: Eat more carbohydrates, protein and vitamins, strengthen physical exercise and keep your body and mind happy.

2. If a friend with lactose intolerance lacks lactase in his body, lactose will reach the lower intestine, which will increase the osmotic pressure of the intestine. At the same time, bacteria will decompose lactose to produce a lot of hydrogen and carbon dioxide, which will stimulate the intestine, causing stomach pain and diarrhea.

There are many people who are uncomfortable drinking milk, especially yellow people and black people. The probability of this happening in white people is between 5% and 30%. However, many people in Asia are mainly supplemented with plant protein from generation to generation, and the number of people who lack lactase can be as high as 90%.

Guiding opinions:

If you are a friend who is uncomfortable after drinking milk and want to supplement dairy products, you can eat less and eat more meals, or dilute the milk with water, which can alleviate some symptoms of lactose intolerance. Then there is yogurt instead, because 20%-30% of lactose in these fermented milk has been degraded, which is easy to digest and absorb. Moreover, lactic acid bacteria can also help decompose lactose and protein in the intestine and promote digestion.