Using castor oil in the navel is a simple yet effective traditional remedy that provides several health benefits, from improving digestion and skin hydration to alleviating pain and promoting better sleep. Using castor oil in the navel is a simple yet effective traditional remedy that provides several health benefits, from improving digestion and skin hydration to alleviating pain and promoting better sleep. Health and Fitness, Health Tips, Exercises & Workout Tips, Diet & Wellness | Times of India Lifestyle