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The pain usually starts on the 3 or 4th run and is situated right in the middle of the Lateral Plantar where the line is pointing to. It is a very sore pain and can get crampy and at times unbearable. Weirdly, if I unbuckle boots after I finish run I get immediate relief and this usually means I'm able to keep sking if I make it a habit. I have pro liner and custom foot beds. No other problems other than this very sore pain in this area.