Tantrums are a daily occurrence for healthy toddlers, but frequent, prolonged tantrums could signal future antisocial behavior or a conduct disorder, according to a new study. Researchers at Washington University School of Medicine in St. Louis found behaviors like constant arguing, defiance and disregard for or abuse of animals could indicate an underlying issue. The key here is excess: A kid who throws a tantrum when told he has to leave the playground is likely showing healthy development—a child who rages for half a day under the same circumstances may have a conduct disorder. If your toddler’s tantrums seem out of step with what’s normal for his age, talk to your doctor.

MORE LIKE THIS: 
5 Secrets to Get Your Kids to Behave
Nap-deprived Tots May Be More Than Just Cranky
Best NJ Places to Take Preschoolers in March