Cold compresses and cabbage leaves are generally safe to use for relieving engorgement and reducing milk supply. However, be cautious about prolonged use of cold compresses to avoid frostbite, and discontinue cabbage leaf use if you have an allergy to cabbage or related vegetables.Remember, if you have any specific concerns or additional questions, it's always best to consult with a healthcare professional or lactation consultant who can provide personalized advice based on your unique circumstances.