Psychiatric disorders are mainly defined by the occurrence of clinical symptoms such paranoia, social isolation or anxiety. However, what is frequently neglected in psychiatric research is the fact that these symptoms interact: paranoia can cause anxiety, axienty can lead to social isolation and social isolation in turn can increase paranoia. Novel methodological tools allow us to capture these interactions by thinking about symptoms as networks. This opens up numerous exciting applications by analysing the structure of symptom networks, their development over time or the interaction with genetic or environmental factors.