Problems with weight as male teenager. - No, im not overweight , im underweight! Hi Everyone. I have a very big problem, since i was very young - 9-10 years - I have always been underweight. Im turning 16 in 2 months and i weight 57kg - 120~ pounds. I have no idea why I cant take weight. Im embarrassed of myself because i feel it makes me weaker in strength. I try to weight train but I dont get anything real out of it, i just stay underweight. I try eat a lot but it doesnt help. I have been to the doc and he tells me to eat more and he cant really help me because i need to eat more. Im really desperate as i really want to be strong, healthy but im stick :(! Do you please have any suggestions what i should do? I do sports and all that kinds of activities. What food should i focus extra on? I thank you a million times for your help!