Bipolar Disorder Causes
Researchers believe that there are many factors responsible for the Bipolar disorders. These factors may work together or combined with other psychiatric disorders that can lead to the bipolar symptoms in many people. There are some genetic, environmental and biological factors which can be resulted into forming chemical imbalance in the human brain, which is the primacy cause of bipolar disorder.
Many researches have proved that multiple genes like chromosomes are related to the development of bipolar disorders in some cases. The first degree relatives, for example, children and parents, are at more risk of getting bipolar disorder in the families that contain the patients with psychological problems. It is also studied that if one among the twin is affected by this disorder then other becomes three times more vulnerable for this disorder. This study showed that bipolar disorders symptoms can easily be inherited in humans. Therefore, we can observe the increasing rates of psychological disorders among the families with the history of bipolar disorder affected people.
Generally, some bipolar disorders are not caused by the viruses. However, some cases show the relation between Borna viruses and the nervous system injuries in the psychiatric patients. Researchers found that these viruses can make some changes in the human brain that finally result into the psychological illness. Some psychiatric illnesses may affect immune system and make people more prone to the stress and other viruses.
Neurotransmitters are mostly found as the cause of bipolar disorder, as drugs used for neurotransmitters also can be used for the bipolar symptoms and mood disorders. Neurotransmitters like norepinephrine and serotonin are the major levels that cause bipolar disorders. Neurotransmitters affect the receptor's cells and their sensitivity. Hence, all these aspects suggest that neurotransmitters are one of the major causes of bipolar disorders.
Stressful situations in life effectively contribute in developing bipolar disorder symptoms in humans. These events may be the result of death of beloved person, separation from parents, failure in career or the loss of child during delivery. All these stressful experiences make negative impression on a person's mind. Hence, that person goes through the depression in life, which ultimately leads to the bipolar symptoms.
Sometimes mood swings may cause bipolar symptoms, and these mood swings occur due to the medical conditions. However, bipolar disorder does not occur to every person who experiences the mood swings.
According to the Diathesis-Stress Model, each person has some physical vulnerabilities to the emotional or psychological problems. These problems occur as per that person's life- experience and the attitude. So, bipolar disorders occur when a person fall as a victim to these conditions.

