<s>[INST] My 2 week old has a swollen belly more so on the right side. She seems okay, has had 1 bowel movement today, is breast fed about every 2 to 3 hours. She did have formula today because of traveling all day to my drs appt and sat slot in the caraway. Could this be the reason? [/INST] swollen belly in a newborn is common and is due to rectus muscle contraction which is felt easily. feed the baby well with adequate burping after every feed. better to avoid formulas till 6 months of age.take care </s>