black thread under lost toenail

[beetaken]

My toenail had fungal infection, it started as a dark area near the cuticle, that dark area moved up and out, until all my nail became rough and finally it separated. I had to cut the dead separated nail and i saw a black thread like thing. I could shorten it but i couldnt remove it because it hurts. This black thread is moveable but it looks like it has a root. It looks like a thick brow hair, much thicker( what kind of fungus is it:((

[brzybaby]

I know exactly what you are talking about.  I have the exact same thing under each toenail that has fungus.  I had cut them very short and saw these dark hair looking strips.  Definitely not a sock fiber, it is growing into the nail.  It is some kind of fungus. I am miserable.  I have about 5 toenails with this now.  I hope you find out what it is.  I just started putting vicks vapor rub on my nails each day in hopes that it will help.  I read about it on the internet.  

[kidnurse]

If you have bad toenail fungus you should look into taking oral antifungals to actually cure it.  Go to a podiatrist if you can afford to.  They also have a liquid Formula 3 you can paint on your toenails, about $40, no prescription needed.  Use antifungal powder on your feet, too, and wash your socks in hot water.  Couldn't hurt to bleach them if they are white.

[Bhupinder Kaur, MD]

Hello,
It can be due to a toenail fungus or due to a hematoma formation under the nail. What you need to do is consult a dermatologist and get a KOH examination of the skin scrapings and a biopsy done if the symptoms persist. KOH examination of the area will clarify whether it is fungal infection or not.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.

[Caryopteris]

It may just be a sock fiber.

Treat the area and all the other nails with tea tree oil every day.  You can get rid of the fungus this way.