Have you ever had black days? Days when you wanted to see nobody and do nothing, even the things you like best? If this happens once in a while, you could call it sadness. But if it lasts for more than three or four days it is known as depression. Depression is not a weakness, but a medical malfunction that takes away your control, and there are two major types. One is triggered by specific events like a death in the family, loss of a job, an injury that affects your ability to function as you typically would. read more