Characterized by pain, edema and increase in breast volume, breast engorgement is one of the most common problems in lactation. An experimental essay was carried out at the Human Milk Bank of a university hospital in Curitiba, Brazil. Sixteen breastfeeding women with lactational engorgement were selected randomly. They were treated by means of massage and milking, manually and electromechanically and breasts temperature were measured, before and after the treatment, in both cases. Thermal asymmetry was found, with a negative temperature gradient of 0.3°C between pre and post treatment in the experimental group, showing that electromechanical techniques were superior to manual ones. We concluded that thermography is an effective and promising method to evaluate women with lactational engorgement.