Pressure ulcers - also called pressure sores or bedsores - can develop if someone spends too long sitting or lying in one position. They are a particular risk for people with dementia. It is important for anyone caring for a person with dementia to know about pressure ulcers. They can be easy to prevent early on but, if early signs of damage are not noticed, they can get worse and become very painful or infected. This section, for carers at home, explains what pressure ulcers are and how to prevent them.