他的问题不象是喝水不够，看下面的link

https://drhyman.com/blog/2017/01/13/simple-steps-dealing-constipation/

And here’s something that often surprises my patients: Low-fat diets can contribute greatly to constipation, despite still being touted as healthy.

A clinical study published in the European Journal of Clinical Nutritionput 11 men on a high-fat diet for two weeks and found that, when compared to a low-fat diet, a high-fat diet accelerated gastric emptying.

You’ll want to incorporate lots of smart healthy fat sources include wild fatty fish like sardines and salmon, olive oil (which lubricates the digestive system) and avocados.