You may not know what started the tantrum. Some children have tantrums because they have learned it is a way to get attention or to get but something else they want. Others imitate parents who have quick tempers. Tantrums probably mean that the child is overcome by anger or frustration. Maybe she has been told too often what she cannot do.
Children seem to have temper tantrums most often when they are overtired, hungry, or very excited.
Although temper tantrums are normal for children this age, they don't happen as often if the child feels loved and important. Keep your child from hurting herself or others. Separate her from other children or from the place where she's having her tantrum or just hold her in your arms. When your child has calmed down, comfort her and try to understand the reason for the tantrum. If you give the child what she wants when she has a tantrum, she might learn to use tantrums to get her own way.