Some breast-feeding mothers claim that certain foods cause colic in their babies. Colic, by definition, is extreme crying that is not related to physical discomfort or digestive problems. But it is possible that some foods affect breast milk and contribute to intestinal gas or other digestive problems, which may make crying episodes worse. More research is needed to investigate this relationship, but foods commonly associated with affecting a mother's breast milk in this way include:
If you suspect that your baby's crying becomes worse after feeding with breast milk, keep a record of what you eat and how your baby acts, especially when crying episodes occur.
WebMD Medical Reference from Healthwise