Healing Substance is a term used to describe substances that are used to treat wounds, burns, and other skin conditions. Two examples of healing substances are Aloe and SALVE. Aloe is a plant with thick, fleshy leaves that contain a gel-like substance that can be applied to the skin to soothe and heal. SALVE is a type of ointment that is made from natural ingredients such as herbs, oils, and waxes and is used to treat minor skin irritations.