The purpose of this trial is to determine the effect of reflexology on breast milk of women with preterm infants. 74 lactating women with preterm infants aged 7-54 days hospitalized in the Alzahra or Taleganie hospitals-Tabriz who have inadequate milk supply were be randomly assigned into two treatment and control groups through stratified [according to recruitment place, multiple or singleton, and infant age (two groups of 7-30 and 31-54)] block randomization. Sequentially numbered opaque sealed envelopes, including a piece of paper with group name written on it, will be used to conceal the allocation sequence. The reflexology will be used on the feet, 10 minutes massage on each foot, once a day for 7 days. The massage will be done on breast, pituitary and solar plexus points in the intervention group and on the shoulder, sciatica and eye points in the control group by the researcher on the first, fourth and seventh days and by the women on the second, third, fifth and sixth days. The researcher will educate the women how to do the massage on the first day and massage will be done under supervision of the researcher on the second day. The main outcomes are: The volume of milk expressed using the electric pump milk by the researcher's help (2 hours after the last feeding and at least half an hour after the massage) and volume of 24 hours expressed breast milk reported on the recording table by the women. The outcomes were measured on the first, fourth and seventh days of the intervention.