There’s no simple answer to this question, as there are so many different factors at play when it comes to child development.This is especially true during this period of time when so many complex physical and cognitive changes are happening. However, research shows that toddlers who experience more than 10 to 20 tantrums per day could be dealing with something more than just the typical terrible twos. Aggression, self-harm, tantrums lasting more than 25 minutes and difficulty calming down after a tantrum were also listed as signs that the toddler might have some behavioral issues that require additional support and attention.