The main symptoms of baby teething are repeatedly spitting out the tongue and licking the area of the tooth socket, followed by drooling and liking to bite things with the teeth. Later, you may see a white projection in the baby’s tooth socket, which means that the baby is teething, and usually the baby will erupt the first tooth at 4-6 months. If there are still no teeth erupting after 12 months, you need to be alert to the occurrence of calcium deficiency. You should take your baby to outdoor activities and get more sunshine to promote the absorption of calcium and to supplement the required cod liver oil and other ingredients in a timely manner.