Here is a list of the common clinical depression symptoms -

• Feelings of sadness or unhappiness
• Irritability or frustration, even over small matters
• Loss of interest or loss of pleasure in normal activities
• Reduced sex drive
• Insomnia or excessive sleeping
• Changes in appetite mostly decreased appetite and weight loss, but in some cases increased cravings for food and weight gain
• Agitation or restlessness — for example, pacing, hand-wringing or an inability to sit still
• Slowed thinking, slow speaking or slow body movements
• Indecisiveness, high distractibility and decreased concentration
• Fatigue, chronic tiredness and loss of energy — a situation where even small tasks may seem to require a lot of effort
• Feelings of worthlessness or guilt, fixating on past failures or blaming yourself when things aren’t going right even if it has nothing to do with you.
• Trouble thinking, concentrating, making decisions and remembering things
• Frequent thoughts of death, dying or suicide
• Crying spells for no apparent reason
• Unexplained physical problems, such as back pain, abdominal pain or headaches