An apparatus for aspirating and irrigating a wound (5), comprises a conformable wound dressing (2) having a backing layer (3) configured to form a relatively fluid tight seal over the wound, a fluid supply tube (6) configured to supply fluid to the wound under the wound dressing, a fluid reservoir (12) configured to be connected to the fluid supply tube, an outlet tube (9) configured to supply negative pressure to the wound, a negative pressure source (18) configured to be connected to the outlet tube to apply negative pressure to the wound, and means for supply flow regulation(14) connected to the fluid supply tube for controlling fluid supply.