There is disclosed a comb. The comb has an upper or a basic part and a number of teeth attached to and pointing out from the upper or basic part, wherein the outer or free end of at least a portion of the teeth forms two curved shapes or curvatures for the touch of a scalp. The first curvature has a radius of curvature substantially perpendicular to the longitudinal direction of the teeth, and the second curvature is curved outwards in relation to the upper or basic part. The radius of curvature of the first curvature may be in the range of 3-14 cm.