What are the side effects of hgh in teens?

Deficiency??: If you take hgh and you don't meet the fda criteria for needing it you run the risk of significant morbidity: raised intracranial pressure, high blood sugar, joint/muscle pain, cardiovascular problems, deformities of bones, and increased long term risk for cancer because of abnormally high growth factors circulating in your body. It would be unwise to take it for doping purposes.