Eating alot but i don't get bigger

[iartchaos4death]

So recently this thought has been going on in my mind and i stumbled across this website and i decided to see if there were any answers to my question.

Im 17, skinny, 60kg, don't really exercise and im 1.85m tall

I usually eat alot like about 4-6 meals a day and this has been going on for the past 3-4 years. Thinking about it, its pretty common if you eat alot you'll get bigger ( fatter) but for the last few years my body hasn't really changed much but my height has and i was thinking there might be a problem with me.

So i was hoping to find some answers to this question, why is my body not expanding?

I've heard from my friends that it could be because i have fast metabolism but everyone has that so yeah..

[iartchaos4death]

I haven't talked to the doctors about this problem because i never thought it was serious.

[Barb135]

Have  you ever had your thyroid tested to see if you might have hyperthyroidism/Graves Disease?  The thyroid controls metabolism, so if your metabolism is too high, that's the first place to look.  Next is to check for diabetes, since one of its major symptoms is weight loss/inability to gain.  

For thyroid, you need to get TSH, Free T3 and Free T4.  For diabetes, fasting blood sugar and hemoglobin A1c........

[iartchaos4death]

and just to let you know how much i eat.. for supper i had a filet o fish burger, MC chicken burger, 6 nuggets and large fries. All from MacDonalds.