Definitions of blister:

• noun:   (pathology) an elevation of the skin filled with serous fluid
• verb:   get blistered

  Example: "Her feet blistered during the long hike"

• verb:   cause blisters to from on

  Example: "The tight shoes and perspiration blistered her feet"

• verb:   subject to harsh criticism

  Example: "The Senator blistered the administration in his speech on Friday"