Starting and running a business can be exciting, but it also brings a lot of stress for entrepreneurs. This review looks at the common causes of stress among startup founders, such as financial pressure, long working hours, uncertainty, and managing many roles at once. It also explores how entrepreneurs deal with this stress, using both personal and workplace strategies. Personal methods like mindfulness, exercise, and time management help individuals stay balanced, while business strategies like delegating tasks, flexible schedules, and team support also play an important role. The review is based on studies from 2015 to 2025 and highlights how stress affects the performance and health of entrepreneurs. Although more attention is being given to mental health in entrepreneurship, there are still areas that need further study, like how stress changes over time, how it affects men and women differently, and how new digital tools can help. The paper ends by suggesting future research directions and the need for better support systems to help entrepreneurs handle stress and succeed in their ventures.