Intestinal mucosal injury is mostly related to intestinal inflammation, irritable bowel syndrome, etc. Drugs to protect the intestinal mucosa include probiotics, antibiotics, bismuth, and so on. 1. Probiotics: patients can take probiotics to restore the normal ratio of bacterial flora in the intestinal wall and promote the rapid recovery of the intestinal environment, so as to protect the intestinal mucosa, such as bifidobacteria, bacillus subtilis and so on. 2. Antibiotics: when patients have intestinal inflammation leading to intestinal mucosal damage, appropriate use of antibiotics can improve intestinal wall edema, promote the repair of broken intestinal tract, and promote the recovery of intestinal mucosa, such as levofloxacin, metronidazole and so on. 3. Bismuth: Bismuth can be directly applied to the mucosa of intestinal wall to protect the mucosa from damage and promote mucosal repair, such as bismuth pectin. If the effect of the above drugs is not good, you should go to the hospital in time, and give targeted treatment after clarifying the cause. All of the above medications should be used under the guidance of a doctor, avoid self-medication.