that's really hard to answer without knowing the cause of your blackened toenails. I looked it up and found a lot of references to "runner's toe" - apparently the constant rubbing of the toenail against the shoes when you're running can cause a blood blister to form under the toenail. The first question for you is therefore about your shoes - does your toes rub up against the tip of them? It could be as simple as that. However, I'd recommend that you go to your family doctor to get checked out and to find out why your toenails are turning black. Is it related to footwear or perhaps an infection or something else entirely? If it's an infection, it could be related to your medication - as you probably know when you're on the Biologics, you are more susceptible to infection. You can also call your rheumatologist to discuss the issue with them.
Sorry I couldn't be of more help. Please let us know what your doctor(s) say?
First of all, I do NOT think this is minor. I have never heard of this, but I think you should call your rhematologist and see what he/she says. Please share if you learn the answer, as it might help someone else. Sorry you have to deal with this, but with RA, seems there is always something new popping up.
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