Iphone camera makes my head look big?

So when I look in the mirror my head just looks normal like i'm used to but then when I take aarm-lenght selfshot with my iphone 4s my head becomes bigger all of the sudden. My head becomes like a lot longer and my nose becomes bigger also so is the iphone accurate or the mirror

Maybe your head is just plane big

Its because the lens is a wide angle lens. The more wider the lens and closer it is the more distortion it causes.

- The mirror.~

No the iPhone is NOT accurate - not at close range. It uses a wide angle lens that causes distortion when used up close (ie at arm's length).

If you want a more accurate image, ask someone else to take the pic & get then to stand back a bit. It's not a fault of the iPhone - all wide angle lenses cause distortion when used close to the subject.