Changes in breast skin temperature during the course of breastfeeding.

Breast skin temperature was measured during breastfeeding in 11 mothers on a total of 47 occasions, using a Coretemp CM-210 (Terumo Corp, Tokyo, Japan), to examine the changes of breast skin temperature during the course of breastfeeding. In both breasts, the breast skin temperature was significantly higher than the baseline skin temperature from the beginning of suckling up to 5 minutes after completion of suckling, and the mean breast skin temperature before breastfeeding between 4 days and 8 weeks postpartum was significantly higher than that on the first 1 to 2 days postpartum. These results show that the breast skin temperature increases between the first 1 to 2 days and 4 to 5 days postpartum and that breast skin temperature remains high during suckling and up to 5 minutes after the completion of suckling. These findings will be useful for educating mothers during the perinatal period on the normal course of breastfeeding by individual instruction or in classes.