An apparatus for irrigating, stressing and/or cleansing wounds comprising: a) a fluid flow path, comprising: i) a conformable wound dressing (2;41), having a backing layer (3;42) having a wound-facing face which is capable of forming a relatively fluid-tight seal or closure over a wound and at least one inlet pipe (6;46), which passes through and/or under the wound-facing face, and which can be connected to a first fluid supply tube and at least one outlet pipe (9;47), which passes through and/or under the wound-facing face, and which can be connected to a fluid offtake tube the point (8;11) at which the or each inlet pipe and the or each outlet pipe passes through and/or under the wound-facing face forming a relatively fluid-tight seal or closure over the wound, at least one inlet pipe being connected to a fluid recirculation tube. ii) a first fluid supply tube; iii)a fluid offtake tube; iv)a means for fluid cleansing (17;23) having at least one inlet port which receives fluid from the fluid offtake tube and at least one outlet port connected to the fluid recirculation tube; b) a fluid reservoir connected by a second fluid supply tube to an integer of the flow path; c) a device for moving fluid through the wound dressing (2;41) and means for fluid cleansing; d) means for stressing the wound bed and optionally tissue surrounding characterized in that the apparatus further comprises the wound, comprising means for applying a varying positive and/or negative pressure which is varied cyclically according to a waveform; characterised in that the fluid reservoir is switchably connected to and further an integer of the flow path via means for flow switching in the flow path between supply of fluid from the fluid reservoir, recirculation of the fluid in the flow path or a combination of the supply and recirculation. a) a fluid flow path, comprising: i) a conformable wound dressing (2;41), having a backing layer (3;42) having a wound-facing face which is capable of forming a relatively fluid-tight seal or closure over a wound and at least one inlet pipe (6;46), which passes through and/or under the wound-facing face, and which can be connected to a first fluid supply tube and at least one outlet pipe (9;47), which passes through and/or under the wound-facing face, and which can be connected to a fluid offtake tube the point (8;11) at which the or each inlet pipe and the or each outlet pipe passes through and/or under the wound-facing face forming a relatively fluid-tight seal or closure over the wound, at least one inlet pipe being connected to a fluid recirculation tube. ii) a first fluid supply tube; iii)a fluid offtake tube; iv)a means for fluid cleansing (17;23) having at least one inlet port which receives fluid from the fluid offtake tube and at least one outlet port connected to the fluid recirculation tube; i) a conformable wound dressing (2;41), having a backing layer (3;42) having a wound-facing face which is capable of forming a relatively fluid-tight seal or closure over a wound and at least one inlet pipe (6;46), which passes through and/or under the wound-facing face, and which can be connected to a first fluid supply tube and at least one outlet pipe (9;47), which passes through and/or under the wound-facing face, and which can be connected to a fluid offtake tube the point (8;11) at which the or each inlet pipe and the or each outlet pipe passes through and/or under the wound-facing face forming a relatively fluid-tight seal or closure over the wound, at least one inlet pipe being connected to a fluid recirculation tube. a backing layer (3;42) having a wound-facing face which is capable of forming a relatively fluid-tight seal or closure over a wound and at least one inlet pipe (6;46), which passes through and/or under the wound-facing face, and which can be connected to a first fluid supply tube and at least one outlet pipe (9;47), which passes through and/or under the wound-facing face, and which can be connected to a fluid offtake tube the point (8;11) at which the or each inlet pipe and the or each outlet pipe passes through and/or under the wound-facing face forming a relatively fluid-tight seal or closure over the wound, at least one inlet pipe being connected to a fluid recirculation tube. ii) a first fluid supply tube; iii)a fluid offtake tube; iv)a means for fluid cleansing (17;23) having at least one inlet port which receives fluid from the fluid offtake tube and at least one outlet port connected to the fluid recirculation tube; b) a fluid reservoir connected by a second fluid supply tube to an integer of the flow path; c) a device for moving fluid through the wound dressing (2;41) and means for fluid cleansing; d) means for stressing the wound bed and optionally tissue surrounding characterized in that the apparatus further comprises the wound, comprising means for applying a varying positive and/or negative pressure which is varied cyclically according to a waveform;