So I'm 15 years old as of october 11. Today I have a cold, and I like, blew my noes in a tissue and there was little black particles in it! I'm so scared, what does that mean? is there something in my lungs? Do I have some kind of disease?! I told my brother and he said it was nothing, its not like there's a lot, just like 4 or 5 little but visible particle black things. Please help! ):
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