Support BladeForums! Paid memberships don't see ads! I have developed a callous at the base of my fore finger. I cook for a living and as such use my knife all day every day. I wonder if this is a normal hazard of the job or am I holding or using my knife incorrectly? Pics of the callous and my pinch grip below. I use a 10 inch, Mundial wide cooks knife. I have ground the spine to round it as I 1st thought that the squareness of the spine was causing the callous, but it isn't whats causing it. Anyone have ideas on this?