The cause of bipolar disorder is not entirely known. What we do know is that biological, psychological and social factors interact with one another and play a role in the onset and progression of bipolar disorder. Genetic factors Approximately half of people with bipolar disorder have a family member with a mood disorder, such as depression. However just because there is an association to a family history of mental health problems this doesn’t necessarily mean it causes bipolar disorder.
Brain chemicals Studies have shown that there is a relationship between brain chemistry and bipolar disorder and that bipolar disorder may be triggered by external factors such as psychological stress and social circumstances which can impact on certain neurotransmitters or chemical messengers in the brain.
Environmental factors Those with bipolar disorder may find that they can link the start of an episode to a period of great stress, such as childbirth, a relationship breakdown, money problems or a career change.
Some experts believe bipolar disorder is linked to the experience of severe emotional trauma in early life, such as physical, sexual or emotional abuse. Grief, loss, trauma and neglect can all be contributing factors.