Hello kindly consult a child specialist (pedodontist) this problem is very much controllable and curable, but please follow the doctors instructions once u go see him, these are milk teeth and baby will keep them for a other 3-4 years. So they are important to save and cure.
Next Steps
Do not bottlefeed the baby to sleep with milk bottle, either swap it with water once he's asleep and clean his mouth with with tooth brushing before sleep. Or cleaning the mouth with a gauze wrapped around the finger.
Health Tips
Avoid foods with fluctuating temperatures.