Borderline Personality Disorder can affect people in different ways. For some people, it might be hard to have relationships because they may want a lot of attention from their friends or family members. People with this disorder may do things that cause problems in their life. For instance, they might use drugs to cope with these feelings or take part in risky sexual behaviors. These behaviors could lead them to get into legal trouble. Because Borderline Personality Disorder affects people’s thoughts and emotions, it can also affect the way they act. For example, a person with BPD might have extreme mood swings from being really happy one moment and then angry or sad the next moment. They may feel like other people are unfair or don’t understand them when really no one is doing anything wrong. Someone affected by borderline personality disorder might hurt themselves on purpose, such as cutting their arm or leg with a knife or burning their skin with a cigarette lighter.