Hi all. I'm posting because on the right side of one of my thumbnails, right next to the nail bed, there is a bit of yellow discoloration that could easily be missed. It's a few square millimeters, seems to taint both the nail and the skin, but it isn't something that I can remove with a file or a toothpick. It has been there for about two days, and I initially thought it was a stain from curry, but it doesn't wash out.
For those of you who have seen a lot of nail fungi, is this something I should be worried about? If so, what course of treatment can I pursue without seeing a doctor?
Background info: I'm a 20 year old male in good health with no known allergies.