Ideally you need to stop domstal drops. Your techniques for feeding, burping and positioning may need alteration. Over feeding can also cause spit up. If baby is active and drinking breast milk or formula feeds well, with adequate weight gain and developmental milestones, then no need be concerned. To discuss further you can book an appointment with me or your local pediatrician. You can follow me on Instagram @pediatrician_india for more helpful tips ! Take care !