The present invention concerns a method for the treatment of polyurethane foam, wherein the polyurethane foam is obtainable from a reaction mixture comprising an ethylene oxide/propylene oxide polyol component with an OH number of ≧20 mg KOH/g to ≦45 mg KOH/g and an isocyanate component with an NCO content of ≧20 weight-% to ≦49 weight-% which is selected from the group comprising diphenylmethane diisocyanate, toluene diisocyanate, their prepolymers with an ethylene oxide/propylene oxide polyol whose OH number is from ≧20 mg KOH/g to ≦45 mg KOH/g and/or their allophanates, ureas, biurets, uretdiones, isocyanurates or carbodiimides. The invention further concerns a polyurethane foam which has been treated by such a method. After the foam formation has finished, the polyurethane foam is irradiated with microwave radiation and the irradiated energy, in relation to the volume accessible by the microwave radiation, is from ≧1.0 kilojoules/liter to ≦2.23 kilojoules/liter. Such polyurethane foams may be used as flexible molded foams in furniture applications.