For me, I was seriously underweight from ages 0-7, started having episodes of hypoglycemia around age 8 but was apparently a healthy weight from ages 8-13 and still suffered from hypoglycemia and then age 14 and above, went back to being underweight. There's people who gain weight with age and may even turn overweight over time, but I turned underweight over time and I was wondering whether that's because I was growing in height and weight just fell of the scale.