People who are diagnosed with borderline personality disorder have at least five of the following symptoms. They may:1
Make frantic efforts to avoid real or imagined abandonment.
Have a pattern of difficult relationships caused by alternating between extremes of intense admiration and hatred of others.
Have an unstable self-image or be unsure of his or her own identity.
Act impulsively in ways that are self-damaging, (i.e. extravagant spending, frequent and unprotected sex with many partners, substance abuse, binge eating, or reckless driving).
Have recurring suicidal thoughts, make repeated suicide attempts, or cause self-injury through mutilation, such as cutting or burning himself or herself.
Have frequent emotional overreactions or intense mood swings, including feeling depressed, irritable, or anxious. These mood swings usually only last a few hours at a time. In rare cases, they may last a day or two.
Have long-term feelings of emptiness.
Have inappropriate, fierce anger or problems controlling anger. The person may often display temper tantrums or get into physical fights.
Have temporary episodes of feeling suspicious of others without reason (paranoia) or losing a sense of reality.