What other mental disorders can appear similar to BPD?
BPD generally causes a wide array of symptoms, so obviously there are many similarities to other mental illnesses. In fact, in my experience, BPs often have a history of being unsuccessfully treated for other mental problems; for example, the BP went through an anorexic phase and was treated for eating disorder; then the BP stopped the anorexic behaviour and acquired a similarily erratic behaviour, which is again treated unsuccessfully. In such a case, after the diagnosis of BPD has finally been made, the patient is often very weary to engage in yet another form of therapy.