By this age your little one is able to throw temper tantrums. She now has her likes-dislikes, her choices and can express herself well too. Tantrums are a normal part of child development. It is the way young children show they are upset or frustrated. When your child can't express how she feels or what she wants, frustration mounts and it may come out as screaming, crying, hitting, breath holding, rolling on ground, etc. Tantrums may happen when kids are tired, hungry, or uncomfortable; or because they can't get something to do what they want.
What you need to know
As a parent or a caregiver one needs to know and understand that tantrums by toddlers occur in the phase when child's language skills are starting to develop and because they can't yet say what they want, feel, or need, a frustrating experience may cause a tantrum. As language skills improve, tantrums tend to decrease.
What you can do
One needs to handle the child patiently. Never loose your cool. Yelling or threatening the child may worsen the situation. Try taking advantage of your little one's short attention span to distract her by giving her some toy or changing her environment (taking her t o balcony, terrace or to other room). Never give in to your child's tantrum. This proves to her that throwing tantrum is a way to get things done. When she gets calmed down, give her a hug and assure her that she is still loved by you the same way.