The reasons for the darkening of the intestine are long-term constipation, or often take irritating laxatives caused. For the above two reasons, to restore the intestinal mucosa to normal, you should improve the constipation, you can often take some honey water to moisten the intestinal tract. Eat more fresh vegetables and fruits to promote intestinal dynamics. Try to avoid taking long-term laxative drugs, such as rhubarb, senna, aloe vera capsules, fruit guide tablets, etc. Although they can solve temporary laxative problems, these drugs can quickly produce drug resistance and repeated use can be very harmful to the gastrointestinal tract. It is advocated to restore intestinal function through dietary regulation, which can be combined with Chinese medicine warming moxibustion and acupuncture point stimulation to promote intestinal motility. Intestinal hyperpigmentation will be slowly reduced, or even completely restored to normal.