Sexual behaviour is a normal and healthy part of life. However, some individuals report excessive sexual appetite and/or an inability to control sexual behaviour. The literature has conceptualised this behaviour as hypersexuality (HS). The aim of this review is to address the challenges associated with diagnosing HS reliably and the lack of empirical evidence on treatment of HS. Further research is required in order to define when or if excessive sexual behaviour is a clinical disorder or symptomatic of either a medical or psychiatric disorder and how this condition should be treated effectively.