There are different types of depressions based on its severity. The different types of depressions are as follows:

Major depressive disorders: It is a major depression, which interrupts the person to perform his routine work. The symptoms of this type of depression are more. The individual suffering from major depression has high risk of suicidal attempts. There are two types of major depressive disorders, which are as follows:

Melancholic depression

Catatonic depression

Dysthymic disorder: It is also called the dysthmia. This type of depression is less severe and the person can able to perform his routine work. The symptoms of dysthemic depression can exist for more than 2 years.

Bipolar disorder: It is also known as manic-depressive illness. It is caused as a result of change of temper from high to low and from low to high. Some of the symptoms of bipolar disorder are as follows:

Invincible belief in oneself

Impulsivity

Fast speech or extreme talkativeness

Psychotic depression: It is a severe form of depression in which the individual may have hallucinations and hear and see things, which are actually not there.

Seasonal affective disorder: This is a general type of depression which is associated with seasons. It is automatically after the passage of a particular season. For example in winter season the day gets shorter and due to which he feels more fatigue. But this is automatically treated when winter season passes away.

Postpartum depression: This type of depression generally happens in women. It happens after pregnancy. During pregnancy the level of female hormones like progesterone and estrogen increases in the body. But after the birth of an infant child the hormonal level in females falls back at a very fast rate to acquire normal level. The doctor thinks that this rapid change in female hormonal level leads to depression symptoms. The symptoms includes headache, fast heart breathing, guilty feeling, no interest in friends and family, no interest in life, hopelessness, crying without any reason.

Anxiety depressive disorder: It comprises of various mental problems such as panic disorder, social phobias, Obsessive Compulsive Disorder (OCD) and post traumatic stress disorder. This is a very severe form of depression in which suicide rate increases. Psychotherapy is the best treatment for anxiety disorders.

Typical Depression: This type of depression is generally found in women. The symptoms include oversleeping, overeating, panic attacks etc. This is not a very serious form of depression but still needs treatment.