I am very skinny with small breast and belly. I felt to have lost confidence. I don't have any fat. I'm too week.. My hands look like sticks.I look like a thin pencil with my friends. My color bone,bones near the neck,elbows are much visible. Even my 11 year old son weighs 23 kilos.. He at least is the weakest in his class,and girls beat him up like anything.. Plz Help..