Eye pillows can be either warm or cold, depending on your preference and the specific benefits you seek. Warm eye pillows are typically heated briefly before use in the microwave or oven. The warmth can help to relax the muscles around the eyes, reduce tension and soothe headaches. Warm eye pillows are also commonly used in yoga and meditation practices to help promote relaxation and focus. Cold eye pillows are typically placed in the freezer for a short amount of time before use. The coolness can help reduce puffiness and swelling around the eyes, alleviate headaches, and relieve allergy symptoms. Cold eye pillows can also be useful after a workout or sports activity to help reduce inflammation and soreness.