I am not sure if this is safe to use on newborns, but if it is, maybe try Vicks baby balsam. I am pretty sure you can buy it at the supermarket, so maybe check the box out and see.

Otherwise, if his temp rises, baby panadol is great. Monitor his temp and if it doesn't go down and reaches 38+ then i would take him to the hospital just to be sure! You can never be careful enough!

HTH,
Nadine.