Define occasional: of or relating to a particular occasion; created for a particular occasion â occasional in a sentence of or relating to a particular occasion; created for a particular occasion; acting as the occasion or contributing cause of somethingâ¦
The list of types of Mental illness mentioned in various sources includes: 1  Depressive disorders. 2  Depression. 3  Dysthymic disorder. 4  Bipolar disorder. 5  Cyclothymic disorder. 6  Anxiety disorders. 7  Panic disorder. 8  Social phobia. 9  Specific phobias.
Types of Anxiety Disorders. Anxiety disorders, as a group, are the most common mental illness in America. More than 19 million adults in America are affected by these illnesses each year. There are many different types of anxiety disorders, including: Post-traumatic stress disorder.