For example, if you eat too much food, and you don't manage your food intake properly, it is easy to be too late to digest. Including eating radishes and sweet potatoes, it is easy to feel some pain in the stomach.
2. If you stand by yourself, you will have a stomachache, so you may have to consider the cause of catching cold.
As usual, if you stand by yourself, you will have less clothes and your body will not keep warm. Including that you may drink cold water or eat raw and cold food, including hard and indigestible food, you are prone to stomach pain.
3. It may be that there is some fatigue in the body and there will be stomach pain.
For example, if you stand for a long time, you will feel some pain in your stomach if you are overworked physically. Including yourself, you may still have some habits of eating standing up, and you will be prone to pain.