my baby are very cute disciplined but few days ago she's starting crying on small small thing and became more demanding and cry baby what can I do

A. this is the peak age when children show temper tantrums there is nothing to worry about this will resolve time it is usually normal for this age,if not associated with any other problems repetitively,you should not worry it does not require any kind of treatment or medicine . if you have any more doubts, get clinical examination done once by the doctor available and get further guidance regarding this.