A comprehensive study was conducted on the ergonomic issues in fox nut harvesting and processing. It is an aquatic food crop with medicinal and nutritional properties. Fox nut harvesting and processing involve an intensive workload of sowing seeds in water, harvesting, segregation, open sun drying, size grading, roasting, and popping. A field visit was conducted in the Katihar district of Bihar, and it was observed that the farmers were exposed to Musculoskeletal disorders due to repetitive work patterns and wrong posture. Further, the farmers were prone to injuries due to unconventional tools and workspace design. The authors have extensively studied the tools and workspace used to process fox nuts. Based on the study, a redesigned mallet for popping and a wooden platform with a new stirrer mechanism during roasting are designed. Further, a detailed redesign of the existing workspace is created to improve the posture during the roasting process. The proposed designs show the importance of ergonomic interventions to improve farmer well-being, prevent WMSDs, and enhance Makhana cultivation’s overall productivity and sustainability.