I looked up my BMI and I'm underweight. Should I do something?
I am a young teen, but should I.... do something?
As long as you are healthy you don't need to do anything really. If you want to gain weigh, eat carbs and candy :)
only if that fact makes you unhappy.
No BMI is bs. Doesn't account for body type amongst other things. Go to a gym and get ur body fat % numbers.
Go to McDonalds. lol jk
Look at yourself are you really all that skinny? If you think you look paper thin go eat some chocolate cake.
Drink pediasure. It helps you gain weight.