Everyone feels sad … anxious … or worried… sometimes. All of us have occasional mood swings from happy to sad. These feelings are normal -- except when they happen a lot or when they get in the way of how you want your life to be. When feelings of sadness and changed moods occur often, they make it difficult to function at work, at school, or in relationships. If this is happening to you, you may be dealing with depression, a common form of mood disorder. It’s important to remember that depression can occur separately from epilepsy. However, it may be related to epilepsy in several ways.