Bella, haha. same here. black right toe, and black left 2nd toe! i have tried various shoe width, i started with Adrenaline Pros, those were a little bit narrow for my feet, i had black nails then. and then now i am wearing Yonex SHB95, still, black nails. i have had black toe nails for as far back as i remember. perhaps it is just my technique...
Try making the laces tighter near the front of the shoe (not too tight) and add an extra insole. This could stop the foot from sliding around in the shoe. I did this and I haven't whacked my toenails recently.
UkPlayer, i have tried the lace. doesn't work for me. the inner sole does seem to make sense, thanks for the suggestion. i will go and look for one with more traction. i also wonder if trying different socks would help. any suggestion there?
Thicker socks may help, but there's only so much thickness to be gained. You can wear 2 pairs, but I don't like this as it's not good for releasing the moisture from sweaty feet. So that leaves the insole to make things tighter. It's a double winner if you get a good thick shock absorbing insole like Sorbothane Double Strike. My SHB 95's with those in them take out a huge amount of impact. It's just a shame I have to switch to the 55's because the graphite plate is no good for my feet. Ah well. Not sure socks will make a difference to traction but a good pair of insoles will.
UKP, i was actually thinking about the traction between the sock and the bottom of my feet. during a hot sweaty day, i sometimes feel that there are more perspiration inside my foot than i feel comfortable. perhaps a change of socks would be the solution, but that's not always an option in the middle of an intense game....