Phobias – Irrational fear such as spiders, heights or crowded people. Generalised anxiety disorder (GAD) – Feeling anxious for a long time, feeling fearful but not anything in particular.  Obessive compulsive disorder (OCD) – Thoughts about being contaminated by germs compelled to wash your hands, do things in a particular order, repeating the same thing.  Post-traumatic stress disorder (PTSD) – Experiencing flashback or dreams of past traumatic events triggering anxiety.  Panic disorder – Panics may occur for no particular reasons and feels out of control.