It's hard for young children to hold strong feelings inside. When they feel frustrated or angry, they often cry, scream, or stomp up and down. This is a temper tantrum. Temper tantrums are a normal part of your child's development. They usually begin around age 12 to 18 months, get worse between 2 and 3 years, then taper off after that, once children are able to use words to communicate their wants and needs. This publication was written by the American Academy of Pediatrics to help parents understand temper tantrums and how best to deal with them.