Abstract : Self-injuring is a process that usually occurs during adolescence; its prevalence has increased over recent years. Nowadays, nearly one out of six teenagers is concerned. The most frequent form is the «superficial» one and corresponds to the term NSSI (Non Suicidal Self Injury) recently mentioned in the third section of the DSM-5. More and more publicized, this practice may disturb. However, it reflects an underlying state of psychic suffering and should not be underestimated or dramatized. It has to be considered as a form of coping even if it is clearly damaging and, in some cases, may be connected to a higher suicidal risk. This article aims at raising the reader’s attention to this expression of the patient’s pain. A better approach of this symptom in its context enables to better understand its clinical significance and to adapt the therapeutical approach.