A normal 15-year-old boy’s height is 170cm, the lowest is 157.5cm, and the highest is 180cm. 15-year-old boy’s bilateral tibial tuberosity epiphysis is not completely closed, so there is still a possibility of growth. You can tell the boy to participate in basketball, badminton, swimming and other sports, which can help the body grow taller, and you can tell the boy to eat more dairy products in his diet, and also to develop good habits, you should get up early and not sleep late. If the effect is not satisfactory, you can use effective symptomatic treatment means, you can use orthopedic wash, local herbal fumigation, or acupuncture, moxibustion and other methods in the boy’s bilateral tibial tuberosity epiphysis area, all of which can stimulate bone growth and development.