Teething is the time in infancy and early childhood when children get their primary teeth.
The age at which a child begins to get teeth can vary. The average age is about 7 months, but some infants' teeth erupt when they are only 3 or 4 months old. Other babies do not begin to get teeth until they are 12 months or even a little older. Getting teeth at any of these ages is normal. Sometimes infants are born with erupted teeth, but these are often abnormal and fall out.
Teething is a normal part of a child's growth and development. In general, children follow a certain pattern of tooth eruption. In some children, teeth may erupt late, in a different sequence, or not at all. Following are some of the conditions that affect normal tooth eruption: