Zit on Nose

I had a pimple on my nose that appeared out of no where one morning. It felt like a normal nose pimple, kind of bothersome, but the wierd thing is that that pimple was so small but it made the whole side of my nose red. I thought i could have been a boil or just an infected blackhead, but i tried popping it and nothing but clear liquid and blood came out and it just healed like a normal pimple i think. I haven't been checked but i know i don't have STD's because i've only had sex once and my girlfriend states shes clean. It only lasted for about 4 days and went way down in size and color.  Any comments would be greatly appreciated.

[loiloi]

It is highly unlikely that this is an STD so please don't worry. Don't pop your pimples this spreads the infection and leads to scarring.