We have the same scenario when my baby was on his younger age too, he got this itching thing in his body, even at the early age he knew how to scratch his body due to the itcheness. My auntie who is a doctor suggested me to try using this milk soap,dilute with water but be sure to shake it before you use it until it bubbles. I was relief, it was slowly vanished little by little. I found it available in Pilipino Store here in Doha in AL Sadd, try maybe it helps in any way.

As they said, Consult the doctor for any symptoms persist, better to visit for check-up

Good luck,doctor knows best but mother knows what is the best for her baby..