The present invention relates to a wound dressing which comprises a hydrocolloid adhesive mass comprising a hydrophobic elastomer matrix comprising poly(styrene-olefin-styrene) block copolymers, particles of hydrocolloid(s) dispersed in said elastomer matrix, and at least one tackifying hydrocarbon resin, characterized in that the hydrocolloid adhesive mass has a deformation ratio γ comprised between at least 0.10 and at most 0.40, as measured by subjecting a cylindrical sample having a diameter of 10 mm, of said hydrocolloid adhesive mass having a thickness of 1.0 mm, at a temperature of 37° C. in an atmosphere having a relative humidity of 60%, to a stress of 5000 Pa in order to cause a creep with which is associated a deformation under stress γC measured after 30 minutes of stress, followed by removing the stress in order to enable recovery characterized by a residual deformation γR after 30 minutes with no stress, the non-dimensional deformation ratio γ being given by:γ=γC-γRγCAccording to one preferential embodiment of the invention, the dressing and the adhesive mass which it contains are in a three-dimensional form having thinned edges.
