My husband was smelling a bad smell inside his nose a few months ago--like gas from the oven--then it went away. Then two weeks ago he smelled something like garbage or rotten eggs, we searched our apartment but couldn t figure out what it was? I didn t smell these things either time. Then last night he smelled the sour egg/bad milk smell again--we sniffed everywhere--until he asked me to sniff his nose--the smell was coming from his nose!! It was rely powerful too! What could that be? And what type of doctor should he see?