did not find Ruyi Oil to be very helpful but do still give 2 times per day after bathing / wiping his body as it cannot be applied too much on them as it's hot.
I either give Ridwind or Woods 2x at night. If he k fart, he is fine altho it irritates him with bad mood like yr baby.
Also let him to lie down with his tummy to fart like what e hospital does. He dislikes it and do not know if it's bec he k only hold up his head momentarily.
Or carry him stomach facing stomach for comfort.
Do remember to cover yr baby's stomach n keep baby's mouth closed.