How to travel to Yunnan with stomachache and loose bowels?

I'll give you a suggestion for reference only. Yunnan is a high-altitude area, from Kunming to Lijiang, Dali to Shangri-La. The altitude suddenly rose from 1000 meters to more than 3000 meters. People from other places will do the same, because they don't adapt. In addition, in summer, the kidney qi radiates outward, and it is too hot to eat cold food, which will happen to stomach cold. I suggest you go to the drugstore to buy some antidiarrheal Chinese medicine such as Changyanning, and it will be all right soon. I wish you a speedy recovery!