Anhedonia is a psychological condition in which a person feels depressed and unable to feel pleasure or satisfaction in an activity or thing they once enjoyed, such as not enjoying a hobby, not feeling happy or sad, becoming emotionally empty, causing the person to interact less with others, feeling tired, feeling alone, feeling more desperate and feeling more negative, dividing the condition into two main categories: social unhappiness, feeling unable to enter society, or being unhappy with other things.