Dilip Shrestha on Instagram: "Persistent Depressive Disorder (PDD), also known as dysthymia, is a chronic form of depression where a low, dark, or sad mood is present most of the day, for more days than not, over a period of at least two years. Unlike major depressive episodes that can be more acute and severe, PDD weaves a persistent, low-grade sense of hopelessness and lack of interest into the fabric of daily life, making it often feel like a part of one’s personality rather than an illness.