The present invention relates to a wound dressing comprising: —an application surface for application to a wound —an absorbent structure for absorbing a liquid discharged from the wound —an intermediate structure located between the application surface and the absorbent structure and arranged to promote the distribution of the liquid from the application surface to one or a plurality of inlet zones having a limited area in the absorbent structure and —a detection system sensitive to the extent of the absorbent structure that is wetted by the liquid having penetrated same via the inlet zone or zones.