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From Fellrnr.com, Running tips
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If you suffer from blisters, sometimes they can prevent you from running normally. In that situation, one option to consider is extreme shoe modification that goes beyond [[Modified Nike Free]]. You may have seen runners at ultramarathons with the top of the toe box cut away to relieve the pressure on blistered toes. I would consider that a moderate modification. Extreme modification is where parts of the sole of the shoe are removed to relieve pressure on a blister. This approach is not without significant risk. The pressure does not go away; rather you move it from one part of the foot to another. This means that while you may be able to reduce the problem from a blister, you can increase the pressure elsewhere, causing other blisters. You can also change the way the shoe supports your foot, causing biomechanical issues. Here are some examples of things I’ve tried.
==Heel Blister==
This modification was to remove the sole and upper on the inside of the left shoe. This worked well overall, and allowed me to run for several weeks while the blister was healing up. The downside was that I removed enough of the heel to put twisting stress on my foot and trigger a little [[Plantar Fasciitis]].
[[File:953586228 Q2Mu3-M.jpg]]
