Im short. how to be tall?

Growing tall: So, what can you do to grow taller if your genes dictate that you’re meant to be short? Well, only a small percentage of people with a short height can grow taller. Studies also show that most people stop growing in their mid-twenties. http://www.beyonddisease.com/top-ways-to-increase-height-and-grow-taller

Not much can be done: Depending on how old you are, you may still be growing. Women usually reach there full height at age 15-17, and men at age 18-21. Height is primarily determined by genes. One environmental factor that can increase height is very good nutrition, with a diet high in protein and lots of fresh fruits and vegetables. Being short is not a limiting factor in life, unless allowed to affect self esteem.

See answer: Regarding treatment to make yourself taller: Once you reach adulthood there is no way to make yourself taller. Growth Hormone can be used to make a child taller if the child has growth hormone deficiency. GH can be used selectively in some children who are unusually short even though they don't have GH deficiency.