<human>: Hi, My baby is 3 months old and yesterday i changed her  formula to S-26 and for the first time she vomited brown vomit. Im not sure why or could it be because i changed to a new formula. Should i be worried? Should i stop using the new formula? Please help.
<bot>: Brown vomits usually indicates altered blood. In other words, there could have been bleeding in the gastrointestinal tract due to some cause. Gastritis is a common cause, but it needs to be evaluated. Although the new formula could have a role, I do not think that we should jump to conclusions. But nevertheless, it might be wise to stay with the previous formula as of now. I would suggest you to visit a pediatrician and get the child assessed. Please do not worry. The child should be fine with some simple interventions.