A Psychiatrist is a doctor who deals with depression. However, if you're experiencing depression, mental health problems, bipolar moods, and symptoms, discussing it with your family doctor can be a good first step. They can refer you to a psychiatrist, who will be able to assess you.

Depression is a complex mental disorder that can be caused by a combination of factors, including genetic, biological, environmental, and psychological factors. Some of the main causes of depression include:

1. Biological factors: Depression may be caused by an imbalance in certain chemicals in the brain, such as serotonin and norepinephrine. Hormonal changes, such as those associated with pregnancy, menopause, or thyroid problems, can also contribute to depression.

2. Genetic factors: Depression can run in families, and research suggests that certain genes may make some people more susceptible to developing the condition.

3. Environmental factors: Trauma, stress, and loss can trigger depression. Life events such as the death of a loved one, losing a job, or experiencing financial difficulties can contribute to the development of depression.

4. Psychological factors: Low self-esteem, feelings of hopelessness, and negative thinking patterns can contribute to depression.

Depression is a treatable condition, and with the help of a healthcare professional, a person can recover and regain their ability to function in their daily life.

If you are experiencing symptoms of depression, it is important to visit a doctor or mental health professional for an evaluation. Some signs that you may need to seek help include:

1. Persistent feelings of sadness, hopelessness, or helplessness
2. Loss of interest in activities that were once enjoyed
3. Changes in sleep patterns, such as difficulty falling asleep or staying asleep
4. Changes in appetite or weight
5. Difficulty concentrating or making decisions
6. Fatigue or lack of energy
7. Thoughts of suicide or self-harm