Why does my nose randomly bleed?

Recently i started MMA classes and ive been slammed around alot and tonight when i blew my nose blood came out of no where but ive never gotten hit in the nose and my head is hurting

Okay maybe not the weirdest- but somewhat strange. At first it started bleeding fast but slowed as i applied pressure. I listened to what my brother told me, which was to keep your head down a little, not up because it makes you want to throw up, and...

Okay, for some reason, I dont know why my nose bleed for no reason? I would just be sitting and my nose would just drip out blood and start to bleed very hard. and other times when i get very hot it bleeds and when i wake up in the morning, i can feel...

so long story short : my dog got outside the house and ran into town which was very busy at the time, and not to mention it was night out so people could not see her well bc she is black and white so im chasing after her and extremely upset that she...

I was in 1st period french today and I felt something come down my nose. So, I check and then I see blood. I was like wtf? It wasn't hot inside the class, it was actually really cold. I excused myself to the bathroom and the bleeding didn't stop for...

My little sister got elbowed in the nose on accident a week ago. Now every time she sneezes or anything her nose will bleed. Why is it?

I was just washing my face with mildly warm water when blood started running down my nose. Nose bleeds are common for me because my nose is broken but this one was very sudden. Does anyone have any clue as to why I just got a nose bleed?

Occasionally I will wake up in the morning and my nose immediately starts to bleed. Why doesn't it bleed while I am asleep and what is causing it to bleed in the first place?