Brown mark under big toenail.

Posted By
12/16/2013 1:38am
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Replies: 3

Hi my name is Paige and just recently i've noticed a strange medium brownish coloured mark under my right big toenail. it's in the nail's right bottom corner and is around 5-6mm vertical and 3 mm horizontal so fairly rectangular.

Now I'm just hoping it's a bruise but do you think it could be something worth investigating?

Thank you :)

Linny - (12/16/2013 - 7:07am)

It could be a bruise, it could be a toenail fungus, it could be anything. But just for peace of mind I'd get it checked out, especially if you have a history of melanoma.

What your doctor will probably do, is take a close look at it and if s/he is not 100% sure what's going on, will mark the top of the discoloration and the bottom of the discoloration and have you come back in 6 weeks or so. If the discoloration stays within the markings it's growing out with the nail and that's a good thing. If the discoloration doesn't grow out, then further testing will be necessary.

Stage III, Unknown Primary; 1 positive node in left axilla; currently participating in GSK DERMA (MAGE A3 vaccine) trial

POW - (12/16/2013 - 12:40pm)

Linny is correct; a bruise will slowly move in the direction of the tip of your toe as the nail grows. Melanoma will not move. 

UrsulaZ - (12/17/2013 - 12:03am)

hi, Paige

I had a similar mark under my thumbnail that did turn out to be melanoma. It extended the full length of the nail before I noticed it. 

But when it appeared, I was already in stage IV. If you have never been diagnosed with melanoma, then your pre-test probability would be lower!

Still worth checking out, in my opinion.

best, 

Ursula