Overheating or prolonged application may cause injury, including burns. Heating beyond the suggested time (15 seconds) may also damage or destroy your Therapearl® 3-in-1 Breast Therapy. It is normal for the Therapearl® to expand a little when heated for the recommended time. If you accidentally heat your Therapearl® beyond the recommended time and see it inflating like a balloon, immediately turn off your microwave, wait for the pack to cool down, and then carefully dispose of your pack. When in doubt or if your pack shows any signs of deforming, dispose of your pack – a pack that has been overheated should never be reused. Therapearl® 3-in-1 Breast Therapy will explode if heated for an excessive amount of time.