People with a varied set of symptoms label their condition “depression.”  These symptoms are set forth by the National Institute of Mental Health.

•    Ongoing sad, anxious or empty feelings
•    Feelings of hopelessness
•    Feelings of guilt, worthlessness, or helplessness
•    Feeling irritable or restless
•    Loss of interest in activities or hobbies that were once enjoyable, including sex
•    Feeling tired all the time
•    Difficulty concentrating, remembering details, or difficulty making decisions
•    Not able to go to sleep or stay asleep (insomnia); may wake in the middle of the night or sleep all the time
•    Overeating or loss of appetite
•    Thoughts of suicide or making suicide attempts
•    Ongoing aches and pains, headaches, cramps or digestive problems that do not go away.

Here some of most common symptoms of endocrine problems:
•    Fatigue
•    Weight gain
•    Weight loss
•    Memory and mental impairment
•    Decreased concentration
•    Depression
•    Nervousness and irritability
•    Heat intolerance/increased sweating
•    Tremors
•    Mental disturbances
•    Sleep disturbances including insomnia