External wounds such as skin cuts or abrasions can often be easily covered with a simple Band-Aid or a larger wound patch to protect them and facilitate their healing. When it comes to some internal surfaces like those of the gut that are coated with a mucus layer, however, such conventional wound healing materials are ineffective because the mucus hinders their firm attachment and quickly carries them away from the wound site.
Click here for original story, Probiotic hydrogels heal gut wounds other bandages can’t reach
Source: Phys.org