Untitled Document For some people, a combination of many factors may be causing clinical depression. For others, a single factor may be triggering the illness.
Depression often is related to the following.
Imbalance of brain chemicals called neurotransmitters - Changes in these brain chemicals may cause or contribute to clinical depression. Certain diseases or illnesses - Ailments such as cancer, heart disease, Parkinson's disease, Alzheimer's disease, diabetes and hormonal disorders can often trigger clinical depression. This is referred to as co-occurring depression. A genetic history of clinical depression can increase one's risk for developing the illness. But depression also occurs in people who have had no family members with depression.