Hi I m a 15 year old girl and I m 157 cm tall but I hate it. Do you think it s possible for me to grow at least 20 cm taller? And how?Thanks?

At 15? Not 20 cm, sorry. Maybe 1 or 2 cm until age 21, there are height surgery but I think that's kinda disgusting

Probably not. You don't have much of a choice when it comes to height since it depends on your bone length. Your bone length depends on your limb proportions and that is already determined by the time you're about a year old. You're 15, so unfortunately, your body is mostly done growing. Most females stop growing height-wise around 14-15 since that is the peak in puberty.

You have at least 1 possibly 2 more growth spurts ahead of you and will gain between 5cm and 30cm by the time you are 20. My daughter was a small teenager as well but she topped out at 175cm by maturity.

No, there is no chance of 20 cm unless you actually haven't reached puberty at all (ie you don't have periods.) If you've had periods for more than 3 years you are finished.

you could when your done growing