People with borderline personality disorder have incredible challenges when dealing with others and themselves because they have inflexible negative behavior patterns, an unstable self-image, uncontrollable emotions, and impulsivity. Their condition is due to a combination of genes, a childhood environment of abuse, turbulence and/or neglect, and erratic biochemistry.
You may be encountering a person with borderline personality disorder if you confront this type of behavior:
1) You are idealized sometimes as the greatest person alive, while at other times you are seen as the worst person. People with BPD often have skewed views of people, whether they be acquaintances or people that are an everyday part of their lives.
2) The person’s sense of self is distorted. The person doesn’t truly understand who he or she really is, so he or she tries on different behaviors. It is not uncommon for them to be distant, authoritative, friendly or hostile with the same person in the same day.