This video explains Rejection Sensitivity Dysphoria (RSD) as a condition where individuals perceive real or subjective rejection extremely sensitively and tend to overreact. The speaker, who has ADHD, shares their personal experience with RSD, highlighting how it impacted their relationships and emotional state. They discuss how finding the right ADHD medication, specifically adjusting norepinephrine levels with Guanfacine, significantly reduced their RSD symptoms, contrasting this with the limited effectiveness of extensive psychotherapy. The video also touches on the challenges of finding the correct medication and the importance of personalized treatment.