Deliberate self-harm (DSH) is a relevant phenomenon that includes several expressions with different import of injury on body, repetitiveness, duration etc., producing anomalies about inclusion or exclusion of behaviors in the classification. In the literature, DSH consists of parasuicidal behaviors, which means “a deliberate destruction of body tissue, with or without suicidal intent” (
1), where a definite intention to die discriminates a suicide attempt from the DSH. The most important classifications are “Self-mutilation (SM), DSH, Non suicidal self-injury (NSSI)”. Indirect methods as self-starvation, drunken driving, alcohol or drug abuse, smoking (
2), as well as more socially acceptable expressions, such as piercing or tattooing, are not considered (
3). The set of behaviors consistently changes, depending on the severity of the injury, the repetitiveness and pattern of behaviors. Two prevalent expressions, consisting of slight injuries on the body, are observed: the compulsive type, manifesting with trichotillomania and association with obsessive-compulsive disorder, and the episodic-repetitive type, manifesting as skin cutting and burning, interfering with wound healing, inserting objects under the skin, hitting the body with objects (
4). Pattison and Kahan explain that self-injury occurs within a short time frame and people are fully aware of the effects on their body (
5). The low lethality of DSH separates it from conscious suicide attempts, because it appears to be a maladaptive coping strategy, unlike a real purpose to die. Several previous research trials stated that the suicidal intent is difficult to recognize, because people often conceal it; therefore, a clear discrimination between the two phenomena is impossible (
5). The high comorbidity between DSH and suicidal behaviors (
6), as well as the increased suicide risk for people with DSH history, support this matter. Furthermore, in Italy, an official non-suicidal DSH index is not yet present. This is a limitation for the studies, since references and data are only international. The Experiential Avoidance Model (
7) provides a model merging the previous theoretical models. The model asserts that DSH (without suicidal intent) is a negatively reinforced strategy to reduce or end an unwanted emotional arousal; this consists of any behavior suitable to avoid eliciting stressful internal and external experiences (e.g. thoughts, memories, somatic sensations). Multiple strategies can be used: thought suppression, drug and alcohol use, avoidance of feared settings and objects. Although it is a maladaptive coping strategy, it is suitable to escape unwanted feelings, and to act as a strong negative reinforcement.