Is it mucousy (is that a word) or is it just a little white? Sometimes herps discharge salt from their nose. If it IS runny, stringy, etc. - well, I think it might be vet time for you...I am sure others will respond with questions for you 
>>Hi, I just noticed a couple of days ago that my veiled chameleon seems to have some sort of snot coming out of his nose. Is this something i should be worried about? Please reply.
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>>My Pets Include: 1 Holland Lop Eared Rabbit, 2 Leoperd Geckos, 1 Veiled Chameleon, 1 Red Eared Slider, 1 Whites Tree Frog(I've owned many others in the past)
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0.1 veiled - Luna
0.2 green anoles Jaida & Jetta
0.1 brown anole - Jamaica
0.2 house geckos - Gaia & Tia
0.2 felines - Kyndra and Líta