Just to clear things up, it is like a line going up my arm, not the entire thing.

I'd still go just in case. Possible poison. Just for your benefit please go

That sounds like blood poisoning, which will kill you if it reaches your heart.

Please see a doctor, because that sounds like an alien incubation.

Ya, I agree, I'd go get it checked out just in case.

What #81 says! You seem really young so tell your parents. Don't ignore it.

it sounds like a very quickly spreading infection and you need antibiotics

Bro go to the hospital or you may not wake up tomorrow.

In all seriousness you need to be careful of the inernets info especially concerning sickness/disease type things I would go get it checked out anyway

that's blood poisioning. my dad never goes to the hospital, for hardly anything, but this happened to him and he went right away. that's the one thing he's been to the hospital for in like 10 years. you need to get this checked out.

It sounds like cellulitis. It's an infection traveling up one of your major veins. Definitely see a doctor. I got stung by a wasp and it got infected in much the same way but mine was on my leg. It will not clear up on its own. You need antibiotics. If you don't have a doctor, go to an Urgent Care or Minute Clinic. They can get you the right meds. Don't wait!

That's blood poisoning. Please go to the hospital NOW.

Don't say "I'm fine" this time, because you could die

This was my thought, too. I recently (within the past few weeks) had cellulitis due to a tick bite. You can get it from anything (even a scratch), and it does look and act like a mosquito bite in that it swells and itches, but the swelling keeps growing larger and it keeps spreading.

When I get bit by Mosquitos, they swell insanely huge. I had one that was the size of a golf ball on my arm. And then one that completely covered the back of my knee. So, I kind of know how you feel when it comes to bug bites? lol.

Seriously. Go to the emergency room. You have a serious health issue right now. If that line reaches your heart the bacteria will spread through your whole body and you will die. This isn't a joke and it's not worth your life to see if it gets better.

This happened to my older brother and it turned out the spider that bit him was poisonous and he had to be on an IV drip for a few days. Even if it could go away on its own, it honestly isn't worth the risk. Just go get it checked.

Please go to the hospital and keep us updated!

Dude, famous last words. Get it checked out. Better safe than sorry-or dead!!

Well, looks like OP is dead.

Ok, so I put some more cream on it and popped the bubble thing on it three times, and now it has went down to my elbow. It is better than my armpit though, an it doesn't itch as much now!

The red line is lymphangitis, its caused by an infection. You need a see a doctor ASAP

Something similar happened to me and turned out it was a whitetail bite. Was stuck on steroids, painkillers and antibiotics for a week but it was better than dying. You should definitely get it checked out man

Hopefully you don't die since you're too stubborn to go to the doctor.

I haven't really read any of the comments besides people saying it could be blood poisoning, which it could be. It could also be a worm infection, my sister got it before from the beach I think it was hookworm and she saw and felt them travelling. Ewww, please get it checked out.

I am glad you saw my comment! Hopefully you are still doing fine.

I know what it is. It's a small bug from South America that lays it's eggs under your skin. The only way to kill it is, take a price of bacon the size of your thumbnail, tape it over the wound, then seal the bacon under the tape, hard. The grub will come up for the bacon, and suffocate under it, then you can pull it out. I have had them before, and I hope you get better soon!