An iron powder for an exothermic composition according to the present invention has a bulk density of 0.3 to 1.5 g/cm.sup.3. Furthermore, an exothermic composition according to the present invention contains the iron powder, a carbon material, a halide salt, and water. Furthermore, an exothermic body production method according to the present invention includes: forming a coated member by coating a base material sheet with a flowable exothermic composition containing the iron powder, a carbon material, and water; and adjusting an amount of moisture in the coated member by removing water from the coated member. Furthermore, the present invention is directed to a production method for the iron powder (an iron powder for an exothermic composition) including: a reducing step of reducing iron oxide to obtain reduced iron; and a step of milling the reduced iron. In the reducing step, the iron oxide is reduced by introducing iron oxide and a solid reductant with a volatile matter content of 10% by mass or more into a heating furnace whose internal portion contains no sulfur gas or is set to an air or inert gas atmosphere, and setting the internal portion to a reducing gas atmosphere through heating under a condition that an ambient temperature of the internal portion is from 900 to 1000° C.

It is an object of the present invention to provide a chemical body warmer that achieves a sufficient heating effect even in a low-temperature environment at about 10° C. or less. A chemical body warmer including a flat housing including one or a plurality of cells each containing an exothermic composition that generates heat upon contact with air, wherein a total area of the cell or the plurality of cells in a plan view of the housing is 200 cm.sup.2 or more, and the chemical body warmer is used by being placed under a blanket.

A heating patch assembly adapted for use on a human. The preferred heating patch assembly includes a heating patch assembly lining and a heating patch assembly thermal conductor. The preferred heating patch assembly thermal conductor is disposed within the heating patch assembly lining. The preferred heating patch assembly is adapted to induce vasodilation and increase cardiac output in the human. A method for increasing cardiac output including applying the heating patch assembly to a human chest.

A heat generator comprises a heat-generating composition that generates heat upon contact with air, a storage bag that can store the heat-generating composition in a storage part inside thereof, and an adhesive layer provided on one surface of the storage bag. The storage bag has, in plan view, an outer shape having a constricted part recessed inward between two convexly protruding first apex and second apex; and the storage bag is provided with a dividing part that divides the storage part and allows the storage bag to be folded between the first apex and the second apex.

An iron powder for an exothermic composition according to the present invention has a bulk density of 0.3 to 1.5 g/cm.sup.3. Furthermore, an exothermic composition according to the present invention contains the iron powder, a carbon material, a halide salt, and water. Furthermore, an exothermic body production method according to the present invention includes: forming a coated member by coating a base material sheet with a flowable exothermic composition containing the iron powder, a carbon material, and water; and adjusting an amount of moisture in the coated member by removing water from the coated member. Furthermore, the present invention is directed to a production method for the iron powder (an iron powder for an exothermic composition) including: a reducing step of reducing iron oxide to obtain reduced iron; and a step of milling the reduced iron. In the reducing step, the iron oxide is reduced by introducing iron oxide and a solid reductant with a volatile matter content of 10% by mass or more into a heating furnace whose internal portion contains no sulfur gas or is set to an air or inert gas atmosphere, and setting the internal portion to a reducing gas atmosphere through heating under a condition that an ambient temperature of the internal portion is from 900 to 1000 C.

It is an object of the present invention to provide a chemical body warmer that achieves a sufficient heating effect even in a low-temperature environment at about 10? C. or less. A chemical body warmer including a flat housing including one or a plurality of cells each containing an exothermic composition that generates heat upon contact with air, wherein a total area of the cell or the plurality of cells in a plan view of the housing is 200 cm.sup.2 or more, and the chemical body warmer is used by being placed under a blanket.

A steam heating tool includes a cover member that has a cover portion covering a mouth and a nose of a user, and a steam generator that is held on a surface of the cover portion on a side of the user, in which a space interposed between the cover portion and a face of the user is formed at a time of use, and the steam heating tool satisfies following formulae (1) to (3): 300VG1,500 (1); 40MV150 (2); and 5VG/MV25 (3), where VG represents a cumulative steam generation amount [mg] released into the space for 10 minutes from a start of steam generation of the steam generator, and MV represents a volume [mL] of the space.

The present invention provides an excellent heating tool in which the generation of unpleasant odors is suppressed. The present invention also provides an excellent heating tool in which changes in aroma are suppressed. The present invention further provides an excellent heating tool in which the generation of unpleasant odors and changes in aroma are suppressed even after storage. The present invention provides a method for suppressing the generation of unpleasant odors and changes in aroma in a heating tool. The present invention provides a heating tool comprising an exothermic composition containing a metal ion sequestrant, an oxidizable metal powder, a water-soluble salt, and water, wherein at least the exothermic composition is housed in an air-permeable container bag.

Methods of treating a wart are provided which include: providing a heating device having a central zone and peripheral zone, sized to cover the wart and skin peripheral to the wart, and including a heat-generating material that undergoes an exothermic reaction when exposed to oxygen; providing a liquid therapeutic adhesive comprising a volatile solvent, skin-compatible adhesive and therapeutic agent; applying the liquid therapeutic adhesive to the skin peripheral to the wart or to the peripheral zone of the heating device; initiating the exothermic reaction of the heat-generating material by exposure of the heat-generating material to oxygen; applying the central zone of the heating device to contact the wart, thereby heating the wart and skin peripheral to the wart to an elevated skin temperature; and maintaining the elevated skin temperature for a period of time, thereby creating an enclosed heated environment treating the wart and skin peripheral to the wart.