Complications and problems that personality disorders may cause or be associated with include:
• Depression
• Anxiety
• Eating disorders
• Suicidal behavior
• Self-injury
• Reckless behavior
• Risky sexual behavior
• Child abuse
• Alcohol or substance abuse
• Aggression or violence
• Incarceration
• Relationship difficulties
• Social isolation
• School and work problems

References:

http://www.nlm.nih.gov/medlineplus/personalitydisorders.html

http://www.mayoclinic.com/print/personality-disorders/DS00562/METHOD=print&DSECTION=all