A cryotherapy device includes a flexible strip (1) having a receiving compartment (4) and a fixing section (5), and an insert having at least one chamber filled with a cooling fluid for maintaining a decrease in temperature and shaped in such a way as to be housed and held in the receiving compartment (4). The insert is a flexible silicone pouch filled with a thermal material gel able to maintain thermal cooling. The receiving compartment (4) is arranged on a first end of the fixing section (5) of the flexible strip (1). The flexible strip (1) is a self-adhesive strip having a length (L) longer than 1.0 m, which has self-attaching means for allowing the first surface of the strip to attach and adhere to the second surface of the strip.
