The present Invention relates to a pen for the treatment of dermatological disorders, such as warts and the like, by means of a coolant. The pen comprises a distal part comprising a holder for the storage of a coolant and a proximal part comprising an applicator for the administration of the coolant to the dermatological surface to treat, which parts extend axially and which parts are in coolant communication by means of a coolant passage In the proximal part, in which a valve body is provided for closing off and/or opening the passage. The passage is provided with at least one bypass for the coolant. In addition, the invention relates to a method for the administration of the pen.
