11-year-old children growing armpit hair may still grow taller, depending on whether the child’s epiphysis has closed. At present, you can take your child to the orthopedic department of the hospital to take X-ray examination to clarify. If the epiphysis has closed, then the child will not be able to grow taller; if the epiphysis has not closed, then the child still has room to grow taller. However, the exact amount of growth is uncertain and is related to the child’s nutrition, sleep, exercise and the height of the parents. Armpit hair is a normal phenomenon in 11-year-old children, indicating that the child has developed secondary sexual characteristics after entering puberty. However, the development of secondary sexual characteristics does not mean that the child stops growing taller. The epiphysis is the cartilage between the epiphysis and the metaphysis, which gets shorter with age. When the epiphysis closes, the bones stop growing. Parents can take their children to the orthopedic department of the hospital for a checkup to see if they can continue to grow.