Occupational illnesses often develop slowly and are easy to overlook, but they can have lasting effects on workers and businesses. Common examples include musculoskeletal disorders, respiratory conditions, hearing loss, skin problems, and work-related mental health issues. These illnesses are usually linked to long-term exposure, poor ergonomics, or job design rather than sudden accidents. Early awareness, proper risk assessments, and practical controls help prevent long-term harm and reduce absence and costs.