Look at the histogram and you can see that this pic is underexposed.
As others have said the skin is over-processed.
IMO it is badly cropped. There's lots at the top and bottom that is completely blocked up and non-contributory.
Crop off the non-contributory stuff, crop to a standard format and you'll end up with a better look.
Either you're blurring wayyyyy too much in PP or your DOF is too shallow, because the completely flat shoulder/back area makes it look like a floating head. Besides, he's pre-pubescent...what facial blemishes are there to cover up?
The front of his head is OOF.
(There is no benefit to post a picture that is 1024 high since most people then must scan to see it. The Forum guidelines suggest a 600 high and 800 wide as a courtesy to others.)