Constipation

If you are a breastfeeding mum, try and eat kiwi,take some oranges and drink plenty of water It will make him poo when he breastfed

If your using formula I’d recommend speaking to your health visitor first but maybe changing the milk as I had the same problem with mine. Also the pre made formula is thinner and helped when he was on the old brand we used x

How long has it been since he poo’d? Newborns can go a good few days between