Ulcers can affect children differently than adults. For instance, children who have peptic ulcers may not show any symptoms until complications develop. Teenagers are more likely than those over thirty to get canker sores. Pressure ulcers from being chair or bedbound are less likely to develop on children than on the elderly, in part because the elderly have thinner outer layers of skin. If you are concerned about your child's ulcers or ulcer symptoms, talk to your healthcare provider.