The botulinum toxin is used more and more in the treatment of the wrinkles of the face and mainly in its 1/3 superior part.
Objectives: To describe the technique of injection and to establish a treatment program based on the anatomical data.
Materials and methods: The description of the muscles and the elements constituting the face makes it possible to specify the play of the muscular balances of the face.
Results: The technique of injection needs certain requirements: It must be of small quantity and not diffuse. The treatment program must be integrated in a unit based on the study of each muscular group of the face and the opposite skin to release a reasonable attitude in the handling in safety of this toxin.
Conclusion: The technique is sure and effective by respecting the indications and the conditions of use.