Is there a blockage in the nostril, or does it appear to be an abscess or tumor? Does she have signs of a respiratory disease, such as nasal drainage, cough or sneeze, wheezing or gasping? Here is a link to read about how to clear a blocked nostril, if that is the case:
Can anyone help? My chicken has similar problem. Very foul smelling thick yellow (chunky) drainage. Seems feverish too. I started a tetracycline antibiotic and have been trying to get the discharge out of her nose but I can't. I smear it with ointment to loosen it up but it's not working. She is eating and drinking well and still enjoying time out side away from the other girls.
http://www.browneggblueegg.com/Article/PluggedNare/PluggedNare.html
Here is a good link to read about the common respiratory diseases:
http://edis.ifas.ufl.edu/ps044