Phobia can manifest in many different forms as well as towards many different things. People who suffer phobia may suffer panic attacks that can make them very ill. Some of the well known are needle phobia, germ phobia and flying phobia. Needle phobia leads to fear of any sharp needle-like objects and not only needles, people who suffer from germ phobia may wash their hands too often and overuse disinfectant products and even manifest antisocial behavior like avoiding the shaking hands. Fear of flying makes people avoid taking planes and heights. Agoraphobia is a social anxiety disorder of fear of embarrassing situations which the person feels s/he cannot escape from or control. It may lead them to be confined to their homes; an environment that they can control. They will be okay receiving visitors at home but will never dream of venturing out into the real world. Bipolar disorder is another slightly different disorder that manifests itself in mood swings and the person appears to have two personalities. It leads to very erratic behavior making these persons to carry out self damaging decisions even suicide.