<s>[INST] My 3 month old son is throwing up and in pain while he eats, and sometimes arched his back after eatting even pulls on the breast and crys. I Just started to see this problem develope more over the past couple of week. I was wondering if I were nursing him and had galblader problem start up arround the same, if that could be affect him and causing his acid reflux with the acid the it is releasing, which is causing me to have painful stomach acke, back pain, indigestion, and a sudden weight gain. Sincerely, Worried Mommy [/INST] Hello, If the baby is gaining weight appropriately and urinating 4 to 6 times per day I do not think you need to worry about this as this could be a simple regurgitation because of overfeeding. But if the baby is stretching the spine backwards and vomiting after every feed and losing weight then we need to consider gastroesophageal reflux and treat appropriately. Hope I have answered your query. Let me know if I can assist you further. Take care Chat Doctor.  </s>