My kid is 2 yrs now and she keeps sucking her fingers mostly. And now her upper teeth is coming in the front and her jaw too.because of this her face appearance is changing. Pls let me know how to change this habit.

i think you should focus at stopping this habit right away, as it is surely leading to the misalignment of the teeth structure. tell her that the doctor has said she has to stop doing this right away, and maybe you can actually ask her doctor to say the same to her, in a firm tone. sometimes, toddlers do listen to their doctors instead of their parents. also, keep distracting her each time she does this. these are all milk teeth that will eventually fall off, but you will still have to make her stop fast. keep applying a little pressure on the teeth and gums very gently, as if you are sending them a little backwards. make sure you are very gentle though.