My 4 year old has little white bumps on his chin, stomach, and back. what can i use to help them go away?

White bumps: It's hard to answer without seeing the bumps. One option is to use a soap free cleanser, like cetaphil-apply and wipe off for a moisturizing effect. Another is to look up "molluscum contagiosum"-a type of wart virus, small domes with white centers, which will resolve after about a year. Another cause might be "keratosis pilaris", a dry skin condition that runs in families.