The invention relates to a treatment system (1) for treating a wound (5) of a subject, wherein the treatment system (1) comprises a treatment arrangement (1000), wherein the treatment arrangement (1000) comprises a treatment cap (100) comprising a first face (101) configured for arranging the treatment cap (100) over the wound (5) and for contacting skin tissue (2) surrounding the wound (5) thereby defining a treatment space (160) between the wound (5) and the treatment cap (100), wherein the treatment arrangement (1000) further comprises at a side of the first face (101) an illumination area (110) configured for providing light (11) at the wound (5).
