Enteral nutrition is the treatment of choice for malnourish patient. Nasogastric tube (NGT) is although a common act. Unfortunately, this procedure can be painful. Also, many patients will need many NGT re-insertion. Therefore, the investigators need to increase the acceptability of this procedure by increasing comfort during NGT passage. Professionals guidelines of HAS (recommendations professionnelles de bonne pratiques de soins) and SFNEP (Société Française de Nutrition Clinique et Métabolisme) talk about the possibility of using local anesthesic without ordering their use. However, NGT tube insertion is often put without pre-medication in the face of an accumulating body of evidence indicating that local anesthetic prior NGT insertion decrease discomfort of the procedure. On the other hand, these studies have been done in the emergency room with NGT of a bigger gauge and for many reasons except enteral nutrition.