According to psychologists, there are different forms of depression. This means that different people can experience it in different ways. For example, it could be in the form of a passing bad mood or an extensive psychological condition, such as a bi-polar illness. If you are suffering from stress, a minor depression, or a manic depressive condition, it is important to know that you need to receive extensive treatment. If you are not sure whether you are suffering from depression or not, there are very many signs and symptoms to look out for. For example, you will know that you are being depressed if you notice that you are getting a lot of pressure from the things that you once used to enjoy. Another sign and symptom of this severe illness are being persistently sad for no specific reason. Additionally, you find it very difficult to concentrate on certain things regardless of whether they are important or not. In most cases, people who are depressed have many suicidal thoughts and ideas.