I am 20 year old boy and my height is 5'2. I want to increase my height . I heard about hgh injections. Iwant to know that where could I find these injections and what would it coast. And is there any injection or something that can help me?

At the age of 20 you must accept that this is your height. It's possible to grow a little more, but not much.

The injections you are thinking about are given to very young children before they hit puberty. Once the growth plates in your bones have solidified you stop growing.

Yep You have to start them by approximately age 7 to 14. The doctor also would have to have ran some endrocronology tests, (like bone density and hormonal levels) to even determine if they were what was right for you.