Except in the cases to be noted hereafter, one or more fistulous openings finally appear in the tumor on the coronet.

There is a gradual increase in the severity of the symptoms, and later fistulous openings appear in the hollow of the heel.

Sometimes the skin is indurated and lies in folds, or the shoe-boil shows abrasions on its surface and fistulous openings leading from abscess centres.

On admission to the hospital in October, 1888, two fistulous openings were seen in the epigastric region, and the foreign body was located by probing.