Numb fingers and dying nails

I mentioned that my fingers and toes are tingly and numb.  Well I remember correctly, one side effect from chemo is fingernail and toenail issues.  It looks  like my nails are dying?  If that's really what it is.  I haven't really researched it enough but I think that's what's happening.   So, I'll spare you the grossness of my toes but here's what my thumbnails look like.  Luckily it's only my thumbnails and not any other fingers but I can't say the same for my toes.  I hope they all come back to normal soon.