You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is A 50 - year - old male presents with a three year history of irritability, low mood, lack of interest in surrounding and general dissatisfaction with everything. There is no significant disruption in sleep and appetite. He is likely to be suffering from: and explain in detail?
Long standing and less severe depressive symptoms along with normal sleep and appetite indicates Dysthymia. Dysthymia: Symptoms of depression are present but are not severe enough to cause socio-occupational disturbance with duration of more than 2 years