Microwave: Place gel pack into microwave for approximately 30 seconds (if the gel pack is at room temperature) or 1 minute (if the gel pack is frozen) on intermediate power. Check that the correct temperature has been reached. Time is based on 800w microwave. Adjust heating times accordingly to suit the power of your microwave.
Hot Water: Bring water to a boil. Remove water from heat and immerse the gel pack for approximately 4-10 minutes. After 4 minutes, check every 1 minute to see if the correct temperature has been reached. Ideal to use for temporary relief of: