To be successful in recovery addicts must learn to identify and face their true feelings. Emotions are often manifested outwardly, through physical symptoms (stomach ache, headache, nail-biting, shouting). It is important to recognise these outward signs of emotion so they do not continue to build inside. Other times physical symptoms may be the cause of feelings, such as depression or protracted abstinence syndrome. It is also important to recognise when these occur so action can be taken.