Panic attacks are frightening but fortunately physically harmless episodes. They can occur at random or after a person is exposed to various events that may "trigger" a panic attack. They peak in intensity very rapidly and go away with or without medical help.
People experiencing panic attacks may fear they are dying or that they are suffocating. They may have chest pain or believe that they are having other symptoms of a heart attack. They may voice fears that they are "going crazy" and seek to remove themselves from whatever situation they may be in.