Hello, thank you for putting your trust in our site, my name is Dr.Abdullah Soliman and I will be your healthcare assistant. first your daughter seems to be a little overweight regarding her height and weight, and she is 11 years and that age is considered as a start of her puberty, and her body is adapted to specific amount of calories and also by consideration to her activity and that she is playing sports. Also increase activity of thyroid hormones increase the metabolic rate and increase the feeling of hunger, another cause might incarcerated is the presence of parasites like entaemeba and ascaris. regarding the increase in activity in thyroid gland there must be other symptoms accompanied by constant hunger like irritability, nervousness, trouble sleeping, exaggerated sense of heat, sweating , fatigue and muscle weakness, if these symptoms are noticed along with constant hunger you may take her to make some lab tests for T3,T4 nad TSH. For suspicion of parasite infestation she my take stool analysis to confirm whether or not it present. If all tests come negative then this is just increased metabolic rate due to puberty and growing and need for calories. I hope this answer fulfill your query and if you are satisfied with the answer please consider giving 5 star rating , and feel free to ask any additional questions and I will gladly help you with an answer.