Things:

-Being told to eat more

-Eating more and it goes into your height instead of your weight, like just ugh :/

-Feeling dizzy for no reason sucks

-Struggling to find clothes that actually fit

-Not being able to wear shorts cause you look so skinny in them and it looks odd to other people

-Losing weight for no apparent reason, or losing weight even though you've eaten tons more

-Even skinny jeans don't always fit

-Being scared of being ill because you'll lose weight and feel weak etc