Acting-out behaviors cause direct anguish for friends, family members, and partners. For example, one borderline woman, Kiesha, became very angry when she felt that her husband was ignoring her at an office Christmas party. So she went up to him, threw her drink in his face, and stalked out. Someone with BPD who mostly acts in may feel extremely guilty over imagined transgressions. They may mutilate themselves, try to hold in their anger, and blame themselves for problems that are not their fault.
Suicide is also a possibility.
Some BPs seem to mainly act in. Some mainly act out. And some both act in and act out. She walked home from the party, a distance of several miles. When she arrived home, she grabbed several ornaments from the tree and crushed them with her hands, causing a great deal of bleeding.