Example attached.

when you do your texture for hte skin have you tried darkening the rgb with the touch up tool ( or what ever your graphics program calls it) for the nostril areas i find that works good to keep that from happening

I've never had to cope with this myself but I do remember a year or so back when there where whole threads about this problem.  It seemed there was a simple solution but as I don't know what it is, your best bet is to do a search for "nostrils" in the forum threads. 

Of course it could be that Halfdragon's solution IS the one.

If I remember correctly, one solution was to put point lights up each nostril and set them to a negative value.

I dont know Daz Studio that well but nostril glow in Poser can be caused by insufficient resolution in the shadow map, either too small a map , or the shadowcam is zoomed out too far.   I have no idea if that relates to Studio .

Raytrace shadows dont have the problem .

Have you got any ordinarary lights in the scene? I don't think the shader is enough to disable the 'autolight'.

Quote - Have you got any ordinarary lights in the scene? I don't think the shader is enough to disable the 'autolight'.

Tried that, got the same results, the nostrils still glowed.

Quote - I'm using the Ah environment light, I have ambient occlusion bias set very low, something like .013 and still I get glowing nostrils - am I doing something wrong?

Maybe you could post all of your settings.  I'm not sure which setting you mean by "occlusion bias" (Environment map saturation maybe).
This has only happened to me when I tried using a regular jpg image instead of a Tif converted Hdr source.