What is this mark under my toe?

[hattiethehat]

I’ve just discovered this mark under my toe on my foot.. any ideas what it could be?

I can’t remember the last time I looked at the bottom of my foot but I’ve certainly never seen it before

Thank you

Could be just a stain from something you've stepped on, but I would go and get that checked. You can actually get melanoma under your foot. It's not likely but side of caution...