You should consult with your healthcare professional before adding anything to a sitz bath. (A sitz bath is a warm, shallow bath that is used to cleanse, provide relief, and promote healing from various health concerns in the perineal area, such as hemorrhoids or childbirth.) Adding Epsom salt or baking soda may enhance the soothing and healing properties of the sitz bath, but adding the wrong ingredient may make symptoms worse. It’s important to follow your doctor’s instructions for your specific condition.