blood blister under toenail during marathon training

Thanks.  That is what he said, but its hard to imagine it will be fine considering how sore it is right now.  I am scheduled for a 5 mile run tomorrow but if I really need to i can swap my rest day I am supposed to have on Friday and just push the schedule back one day.  

Yup:

In the 1999 Marathon des Sables I lost all toenails but three when French medics pulled them off or gently drilled through them. Blood blisters underneath from feet swelling in the heat. The Discovery Channel filmed the procedure and included it in their documentary on the race. The day after they pulled them I had to run a 52 mile stage of the race. In sand. Across the largest dune on earth, Erg Chebbi in the Sahara.

I could run but it hurt pretty darn bad at first. I had some Aleve that helped but there was no getting around the fact that the first steps were... truly sacred in terms of the pain.

Be careful about the fit of the toe box of your shoe. It may hit the top of your toenail and irritate it. Keep an eye on the toe for infection.

Ultimately it will prbably be uncomfortable on and off for a while but it will heal and it is a non-harmful (albeit painful) way to explore the frontiers of pain tolerance.

No offense, but I lol'd at the you going to the podiatrist for a bum toenail.    I guess somebody needs to keep the specialists in business since I sure don't. 

Anyways....pretty normal.   This was my toe about a week after finishing Coeur D' Alene this year.  It was just sort of red at the end of the race, but hurt like hell.  Pain went away the next day, but a week later I realized it was weeping clear fluid out from under it.  About 5 minutes later it looked like this:

slight warning for the weak...

That is pretty nasty, and no offense taken by your post but if you read my later post I went to see someone about it because it looked like it was on the verge of infection, and I am on a medication that significantly weakens my immune system... so the last thing I need is to end up out of commission because of a terrible infection that could have been avoided.  

toenails are for wimps.

yeah- it'll feel much better in a couple days.  you'll be fine.  Welcome to the club.

in the future- keep your toenails well clipped and filed.

Best methods of prevention are regular pedicures (twist my arm!) and making sure you keep the toenails short!

Also, as others have mentioned, make sure the toe box has enough room.  HOWEVER, if you believe you have plenty of room in your toe box but are still having issues then try out different socks.  I was running in one kind of sock last year that would allow my foot to slide around too much and thus I was beating up on my toenails a little.  Switched socks and now have happy toes!

As for what to do now...try running...if it hurts, stop and wait another day.