I'm happy that you have asked me to assist you with your child and hope that you can benefit from my many years of helping parents like you.
It is quite common to see this in the first teeth as they erupt before all the enamel is formed so will have almost a translucent appearance with white spots being those parts of the tooth that have hardened, so to speak.
I would not worry at all about this as it is not due to anything you gave him to eat and the medications we use now don't stain the teeth (such as tetracycline, which we don't use in children anymore).
I see you are offline so I'll watch for your return to chat.
I ready to assist you when you return to chat.