Claustrophobia is a fear of enclosed spaces. Severity of this phobia can vary from person to person. Small rooms, crowds and even large rooms can provoke symptoms. These people might also encounter an episode on roller coaster ride with security restraints. Medical testing also becomes difficult for claustrophobic people as they are conducted in rooms. In closed room, a claustrophobic person may sweat, shake, have palpitations, may also cry and yell. The cause can be a past bad experience. Cognitive Behavioral Therapy is quite successful in treating such patients.