Exemplary aspects of a wearable device are described, including a body, an attachment element, and a plurality of energy generators. The body may include a flexible material layer and be conformable about a head of a user. The body may have a power source. The attachment element may include a band to maintain the body about the head of the user and a skin facing surface of the body against skin of the user. The plurality of energy generators may be independently operable to convert electricity from the power source into a plurality of different energy types transmittable towards the skin of the user. At least one of the plurality of energy generators may be disposed at least partially within the flexible material layer. Related apparatus, methods, and systems are described.