While sparring and moving around on the mat a lot, halfway through the training the skin under my big toes starts splitting. At the end of the training the split can get pretty big (~1cm) which makes it painful for me to move around and it takes around a week to fully heal.
I'm also afraid it might get infected at some point since my open skin is in contact with the mat the whole time. I have used kung fu shoes from time to time but they feel uncomfortable and I don't have the same grip.
None of the guys I train with have it and they keep saying that it's normal in the beginning and at some point the skin just hardens and stops splitting. However, I've been having this problem since I've started bouncing around and moving around my opponent more.
What can I do to stop/minimize this? I can't find any advice on how to deal with this.