Foot disorders may arise from different functional impairments. In all cases the resulting problem relates to a disturbance of the normal load bearing mechanisms of the foot, frequently with associated pain. Devices used to assist the patient are usually designed relying on the talent and expertise of well trained clinicians. The number of experienced clinicians in such field is few compared to the needs of the society. In this research, expert system techniques are used to design foot orthoses using intelligent methods which are based on fuzzy logic and Genetic Algorithms. The design is assessed using a specified design problem namely a diabetic foot with an ulcer risk. The proposed design can achieve better pressure distribution. Further, such a design can be applied to other comparable problems of a similar nature.