Migraine - Effective Hot / Cold Therapy Technique Migraine pain has been described as one of the worst pains anyone can suffer. Treating a migraine as soon as it starts is key to keeping them from escalating into a full blown excruciating headache. Arthritis - Efficient and Versatile Heat treatments, such as heat pads or warm baths, tend to work best for soothing stiff joints and tired muscles associated with arthritis. Heat is especially good for getting your body limber and ready for exercise or activity. Cold is best for acute pain, numbing painful areas and decreasing inflammation and swelling. Dimension's = 16 inches long x 7.5 inches wide Reusable The Relax Hot/Cold Pad has a special design which allows you to sit the pad on your shoulders and neck area without you having to hold it in place. This is very convenient in that you can sit on your couch or in front of your computer and allow the pad to work its magic to relieve your sore muscles or sooth away the tension and stress from a long day at work. The Relax style pad can also be used on other parts of your body such as your upper and lower back, abdomen, arms, legs and joints. Approximate heating time is anywhere from 1-2 hours. Once the Heating-Pad has given off all of its heat it will remain in its crystallized state until it is recharged. To recharge simply place the heating pad in a pot of boiling water for approx. 5 to 10 minutes depending on the size of the pad (larger pads take longer to boil) until all the crystals are completely gone and the pad is back to its original liquid state. Once completely liquefied, remove the ClickIt Pad from the water and store it until it is required. You may store the heating pad anywhere other than your freezer (freezer can cause damage to the heating pad) The Heating- Pad should remain liquid as it cools. If crystals start to form as the pad cools this means that it has not been boiled long enough and should be re-boiled. Recommended boiling technique: Place water in a pot and bring the boil to a rolling boil. Once the water is boiling turn off your stove/burner and place the heating pad in the water. In this way you do not have to worry about forgetting that you were boiling the pad. This may take a bit longer to recharge since there wouldn't be a constant heat.