When a person's behaviour is socially disturbing, non-adaptive and distressing it is considered abnormal. This kind of behaviour is often the result of many distorted thoughts. There are many aspects and theories that focus on explaining the factors and the causes of abnormal behaviour in an individual. The first step to understanding the cause of the abnormal behaviour is to diagnose it and identify the abnormal behaviour treatment. This process is very successful in dealing with other diseases like measles and influenza which leads to dealing with the abnormal behaviour of the individual. The other factor that hinders the effectiveness of the diagnosis is based on the behaviour disorder symptoms that may be caused due to other reasons. The symptoms of abnormal behaviour can vary from person to person, where someone may act or also display emotions in different ways. They may easily get annoyed or nervous, refuse to follow the rules and regulations of the society, arguing, throwing anger tantrums s and often put the blame on others for their wrong doings. However if a behavioural disorder is left unattended or untreated it may have negative short term and long term effects on an individual's professional as well as personal life. Hence the causes of abnormal behaviour are very complicated. It is not always possible to evaluate all the various factors that are responsible for it. Some may vary from mental deficiencies to psychological disorders. Some may be the result of environmental influence or from physiochemical origin.