A packing strip probe is used to medically treat a sub-dermal cavity that is created by an abscess, an ulcer, or a deep wound. The probe comprises a rod, a blunt tip, and a probing tip. The rod is the main structure of the probe, and the blunt tip and the probing tip are located on opposite ends of the rod. The blunt tip is used to open up the sub-dermal cavity and to gently debride the sub-dermal cavity. The probing tip is used to aggressively debride the sub-dermal cavity and guide a packing strip into the sub-dermal cavity. The probing tip comprises tines, slots, and a rounded end. The tines can be used to either aggressively debride the sub-dermal cavity or wrap and insert the packing strip into the sub-dermal cavity.