Lack of self-awareness is a common outcome for people who sustain brain injuries with frontal lobe damage. When this happens it becomes difficult for a person to assess his or her own ability and limitations, depending on the degree of injury. For example, someone might know they have a problem but do not recognise when it happens, or know how to respond. In other cases, a person may refuse to acknowledge that there is a problem at all. The person may believe that family members are lying or exaggerating the problems. This lack of self-awareness can lead to unrealistic goals such as returning to work despite a severe brain injury.