how to grow height after 21

How to increase the height of a 21-year-old?
As for the closure of the bone ends, there is a good role for surgical intervention through the Ilizarov or the intramedullary nail operation
What is the advice in your case?
A x-ray of the left wrist is made and the bone age is determined compared to the real age
What are the causes of short stature?
Parental inheritance
Genetic diseases
A natural delay, which occurs in many cases at a young age, where this is a natural delay and the growth phase occurs after a period.
Malnutrition
Growth hormone deficiency
Hormonal disorders