Definition

It may be an unhealthy emotional state that is characterized by persistent unhappiness, sadness, low self-esteem and lack of motivation.

Accompanying signs & symptoms

Key symptoms: unhappiness, sad, low self-esteem, unmotivated

Accompanying symptoms include: feelings of tiredness, lack of energy, poor concentration, anxiety, agitation, poor sleep, nervousness, tension in the body

Possible Causes

Accumulated physical and mental exhaustion
Stress
Unpleasant event
Environmental factors
Family history

Physiological Mechanisms

Depression is often seen as an advancement of severe stress and tension in the body which has been poorly managed. Extreme physical and emotional tension results in stiff neck, shoulder and back, nervousness , shallow breathing, agitation and general unhappiness without a reason. They often feel the urge to cry which appears to be our body's reaction to release the tension.

Treatment Modalities

Acupuncture, Chinese herbal medicine, Chinese herbal treatment for depression

Mechanism of action of the herbs used

Acupuncture and Chinese medicine treats the condition by doing the following:
Restoring the balance of chemicals in the brain 
Reducing the stress of the body
Promoting deep relaxation of the body
Calming the mind and body
Reduce tension in the body
Improve emotional wellbeing

Health Advice

Reducing the intake of caffeine and cigarette smoking
Eat a balance diet
Establishing a regular eating habit
Encouraging moderate, regular and outdoor exercises

References

Longman concise medical dictionary, 1994

Chinese-English Manual of Common-Used in Traditional Chinese Medicine, Ou Ming, 1995