A stoma is pinkish-red in colour, similar to the colour inside a person’s mouth. It’s normal for it to be red and isn’t a wound, however if the colour changes significantly or it becomes inflamed, a medical professional’s opinion should be sought. It may be swollen after surgery is first carried out and may take some time to reduce in size, and it should be carefully measured each time a new bag or flange is applied, to ensure a correct fit.