A device comprising a heat-generating component that comprises an alkali metal is provided. The alkali metal in the presence of water at a point of contact of the device undergoes an exothermic reaction to generate heat in situ. The amount of heat generated is proportional to and/or limited by the amount (or moles) of water at the point of contact, and the heat generated is sufficient to achieve an increase in temperature at the point of contact to achieve a therapeutic or beneficial result. In one embodiment, the device is used for reducing sweat production in a subject suffering from excessive sweating or hyperhidrosis. In other embodiments, the device is used to substantially sterilize a surface or render a surface substantially aseptic.

A device comprising a heat-generating component that comprises an alkali metal is provided. The alkali metal in the presence of water at a point of contact of the device undergoes an exothermic reaction to generate heat in situ. The amount of heat generated is proportional to and/or limited by the amount (or moles) of water at the point of contact, and the heat generated is sufficient to achieve an increase in temperature at the point of contact to achieve a therapeutic or beneficial result. In one embodiment, the device is used for reducing sweat production in a subject suffering from excessive sweating or hyperhidrosis. In other embodiments, the device is used to substantially sterilize a surface or render a surface substantially aseptic.

A steam heating mask having a mask body portion covering a nose and a mouth of a wearer when wearing the mask, a pair of ear hook portions provided at both left and right ends of the mask body portion, and a steam generator on the mask body portion, in which a proportion of an area occupied by the steam generator ranges from 30% to 80% with respect to an area of an entire surface of the mask body portion on a side of the wearer. The steam generator includes a first sheet on a surface of a steam generating portion on the side of the wearer with degree of air permeability being equal to or less than 7,000 sec/100 ml and a second sheet on a surface opposite to the surface of the steam generating portion with a degree of air permeability being greater than 8,000 sec/100 ml.

A steam heating mask having a mask body portion covering a nose and a mouth of a wearer when wearing the mask, a pair of ear hook portions provided at both left and right ends of the mask body portion, and a steam generator on the mask body portion, in which a proportion of an area occupied by the steam generator ranges from 30% to 80% with respect to an area of an entire surface of the mask body portion on a side of the wearer. The steam generator includes a first sheet on a surface of a steam generating portion on the side of the wearer with degree of air permeability being equal to or less than 7,000 sec/100 ml and a second sheet on a surface opposite to the surface of the steam generating portion with a degree of air permeability being greater than 8,000 sec/100 ml.

A oil treatment system, method and device are disclosed. An oil impregnated treatment pad is attachable to a carrier, with a heat pad attachable to the carrier, so as to deliver the treatment to a user with a heat source adjacent to the treatment pad.

A device for a medical or cosmetic treatment based on heat is provided. The device includes an impermeable backing layer and an adhesive layer in contact with the backing layer. The device also includes an alkali metal selected from a single, free alkali metal and an alloy alkali metals, the alkali metal in contact with at least a portion of the adhesive layer to define a treatment region. The device also includes a release liner in contact with the adhesive layer and the treatment region. A heat delivery system or kit including the device and a method for its use are also provided.

A device for a medical or cosmetic treatment based on heat is provided. The device includes an impermeable backing layer and an adhesive layer in contact with the backing layer. The device also includes an alkali metal selected from a single, free alkali metal and an alloy alkali metals, the alkali metal in contact with at least a portion of the adhesive layer to define a treatment region. The device also includes a release liner in contact with the adhesive layer and the treatment region. A heat delivery system or kit including the device and a method for its use are also provided.

A system for delivering thermal therapy to a treated body portion of a subject. The system preferably includes a therapy compress having at least one pocket or retainer, and at least one self-heating element configured for removable insertion within the at least one pocket of the therapy compress. In some example embodiments the therapy compress is in the form of an eye mask having first and second eye-covering lobes, each eye-covering lobe having a pocket for receiving a self-heating element. In some example embodiments the at least one self-heating element is air or oxygen activated, for example including a zinc-based self-heating material.

An object of the present invention is to provide a water absorbent resin powder for a heat-generating element composition, which suppresses the generation of the aggregates derived from the water absorbent resin and the adhesion of the water absorbent resin in the production of a heat-generating element composition.

A present inventive water absorbent resin powder for a heat-generating element composition includes polyacrylic acid (salt)-based water absorbent resin powder which have a bulk specific gravity (specified by JIS K3362) of 0.630 g/cm.sup.3 or less, fluid retention capacity without load (CRC) for a 0.9% by weight aqueous solution of sodium chloride (specified by ERT441.01-2) of 32.0 g/g or less, a weight-average particle diameter (specified by sieve classification) of 250 μm or more, and an amount of a residual glycidyl-based crosslinking agent of 10 ppm or less.

An object of the present invention is to provide a water absorbent resin powder for a heat-generating element composition, which suppresses the generation of the aggregates derived from the water absorbent resin and the adhesion of the water absorbent resin in the production of a heat-generating element composition.

A present inventive water absorbent resin powder for a heat-generating element composition includes polyacrylic acid (salt)-based water absorbent resin powder which have a bulk specific gravity (specified by JIS K3362) of 0.630 g/cm.sup.3 or less, fluid retention capacity without load (CRC) for a 0.9% by weight aqueous solution of sodium chloride (specified by ERT441.01-2) of 32.0 g/g or less, a weight-average particle diameter (specified by sieve classification) of 250 μm or more, and an amount of a residual glycidyl-based crosslinking agent of 10 ppm or less.