Is depression a mental illness?

Yes. Depression is a serious psychological problem, but it is treatable. It is a medical problem, not a personality weakness. Depression is also a very common condition. Every person feels sad from time to time or is affected by loss, loss of a person or self -esteem. But clinical depression, also called ‘Great Depression’, ‘Deep Depression’ or ‘Serious Depression’, is a serious medical problem that requires occupational diagnosis and treatment.