Orthosis, configured to be worn by a patient, particularly to treat a medical disorder of the patient, the orthosis (1) comprising: a rigid support device (2), for example a rigid exoskeleton or a rigid frame, to support the patient and/or correct a posture of the patient during use; a system (11) to provide electrical treatment, for example a FES system to provide functional electrical stimulation; and a system (20) to provide thermal treatment.