This is very interesting, you may want to consider cropping out the white/blue at the bottom left of the photo. It is quite distracting.

but that will crop its mouth as well ...It was there in the picture itself

True but IMO it will still hold the interest of the viewer as well as the feeling of being a face itself. If it were me, just a suggestion, I would crop up to the shadow below the nose and a little from the right. Maybe try the crop and see what you think, if you don't like it cropped it's all good and if you are happy with the photo this way that is great too.