Panic disorder is an anxiety disorder and is characterised by unexpected and repeated episodes of intense fear accompanied by physical symptoms that may include chest pain, heart palpitations, shortness of breath, dizziness, or abdominal distress.

If you often feel anxious without reason and your worries disrupt your daily life, you may have generalised anxiety disorder (GAD).

Obsessive-Compulsive Disorder, OCD, is an anxiety disorder and is characterised by recurrent, unwanted thoughts (obsessions) and/or repetitive behaviours (compulsions). Repetitive behaviours such as handwashing, counting, checking, or cleaning are often performed with the hope of preventing obsessive thoughts or making them go away.

“Fear” is the normal response to a genuine danger. With phobias, the fear is either irrational or excessive.

Agoraphobia is a type of anxiety disorder related to fear. With agoraphobia, you fear being in places where it may be difficult or embarrassing to get out quickly or where you may have a panic attack and can't get help. Because of your fears, you avoid places where you think you may have a panic attack or panic-like symptoms.

For some people,  normal nervousness is magnified into extreme anxiety, fear and self-consciousness. Everyday social activities, even the most mundane, are virtually impossible. You may avoid dating, giving speeches or attending parties altogether.

Trauma has both a medical and a psychiatric definition. Medically, trauma refers to a serious or critical bodily injury, wound or shock. This definition is often associated with trauma medicine practiced in emergency rooms and represents a popular view of the term. Psychiatrically, trauma has assumed a different meaning and refers to an experience that is emotionally painful, distressful or shocking, which often results in lasting mental and physical effects.

Acute stress disorder develops within one month after an individual experiences or sees an event involving a threat or actual death, serious injury, or physical violation to the individual or others, and responded to this event with strong feelings of fear, helplessness or horror.

Post-traumatic stress disorder is a type of anxiety disorder that's triggered by an extremely traumatic event. You can develop post-traumatic stress disorder (PTSD) when a traumatic event happens to you or when you see a traumatic event happen to someone else.