[Sticky] What is BPD / EUPD?
In it's most basic definition, it's when we have emotional responses that are disproportionate to the situation. Although, that is probably far to simplistic and explanation.
Often BPD/EUPD is mistaken for Bipolar, due to the erratic moods. The difference is that with BPD/EUPD is the moods can fluctuate so much more frequently. It can be on an hourly basis, and the moods can last for a few days, possibly even a couple of weeks, but for someone with Bipolar, the moods will last much longer.
BPD (Borderline Personality Disorder) is slightly different from EUPD (Emotionally Unstable Personality Disorder), as someone (like me) who has EUPD tends to have the impulsive behaviours.
Here are a few articles that are worth reading that give more insight into what BPD/EUPD is, how it's diagnosed, treatments, medication etc.