Yes, my son has a yellow tint across his top teeth and bottom teeth right along the gums. There are also a couple yellow dots on several teeth. Can you tell me what causes this? His teeth are brushed 2 times a day, morning and night. I also use fluoride drops for him and have since he was about 6 months old. I have wiped his gums with infant toothpaste and a sponge even before he had teeth. Not sure what I m doing wrong or what has caused this.