My Sister Is 5'4 and 100lbs!! Is she underweight?
Hi, Mia. If she is a teenager, yes, she is underweight. Not badly, but still yet she is. Now according to what most of society says these days, she's just fine. But that's not really a healthy weight if, indeed she's a teenager.
How old is she?
No. She is not.
Yes she is underweight. Just by a little bit.
She it under weight. She should be about 115lbs.