The invention relates to a medical plaster (1) with a layer (2) of textile fabric or plastic, an adhesive layer (5), and an absorbent dressing layer (3). To permit individual dosing of an active substance and/or a physical cooling effect, it is proposed that the fabric or plastic layer (2) has an opening (4) in the area of the dressing layer (3), such that the dressing layer (3) is exposed and accessible in the area of the opening (4). The invention moreover comprises a medical kit (100) with the plaster, and a hood that has the plaster (1) as an integral part.