Depression is a mood disorder that causes a persistent feeling of sadness and loss of interest. Also called major depressive disorder or clinical depression, it affects how you feel, think and behave and can lead to a variety of emotional and physical problems. You may have trouble doing normal day-to-day activities, and sometimes you may feel as if life isn’t worth living.
Symptoms of depression can include:
- Persistent feelings of sadness, hopelessness, worthlessness, or emptiness
- Irritability, frustration, or restlessness
- Loss of interest in activities or hobbies that used to be enjoyable
- Difficulty sleeping, sleep disturbances, or sleeping too much
- Fatigue and lack of energy
- Difficulty thinking clearly, remembering, concentrating, or making decisions
- Appetite or weight changes
- Recurrent thoughts of death or suicide
- Physical symptoms such as headaches, stomachaches, or back pain
The causes of depression are not fully understood and may not be down to a single source. Depression is likely to be due to a complex combination of factors that include:
– biological – changes in neurotransmitter levels
– environmental changes
– psychological and social (psychosocial) changes.
– Childhood trauma.
Life events: These include divorce, work issues, relationships with friends and family, financial problems, medical concerns.
Chronic pain syndromes: chronic conditions, such as diabetes, chronic obstructive pulmonary disease, and cardiovascular disease make depression more likely.