Blisters can be caused by this resistance to motion between surfaces, from the Latin for "to rub"
The friction between the head of the match and the matchbox 
causes a... [DOC] [TLE] Common Foot Pathologies [PAR] walking pattern (over-pronation) may cause the thigh and lower leg to rotate ... 
the patella to rub against the medial femoral condyle instead of moving .... First 
push up on the plantar surface of the metatarsal head and see if the toe 
straightens out.