My baby is not even 4 days old and loves to roll on his left side to sleep.

My little girl did this too! I was so worried and mentioned to the health visitor when she came and she said not to worry whenever i see to roll her back, but don't keep checking. My little girl was in that exact position in my tummy so it was comfy for her! Eventually she stopped, then she started to roll properly and she went back to side sleeping ☺️

Just roll him back when youve seen that hes done it, try not to stress x

It’s called the newborn curl! Should disappear by 2 weeks

My daughter slept like this her first 3 months until she started rolling on her own.

This is called the newborn scrunch, it's usually due to residual muscle tension from birth. He should outgrow it. I don't think it's a problem as long as you continue putting him on his back when you put him down, and make sure there's nothing in there with him.

Roll up a recieving blanket and put on on this side so he cant roll.