Inadequate care during pregnancy and postpartum are predisposing factors for the emergence of nipple fissures. The therapeutic approach of nipple trauma care guidelines aimed at the breast and the appropriate techniques for breastfeeding. These measures, however, have a much more preventive than curative, it is not, in most cases, sufficient to power the closing of nipple trauma. The objective of this study was to evaluate the effectiveness of a phototherapy device designed specifically for the treatment of nipple trauma.