IPL is considered safe to use, providing the device is from a reliable, trusted brand and instructions are followed as advised. Occasionally, some people may experience side effects such as redness, discomfort, or, very rarely, blisters or burns. If any irritation occurs, consult a medical professional. How to use IPL devices? For IPL hair removal to work effectively, some hair needs to be present for the energy to travel down to the follicle from the surface of the skin - but not so much that you run the risk of burning the skin. For that reason, it's best to shave before your IPL session rather than completely remove the hairs by waxing or epilating. To fully break the growth cycle of your unwanted hair, regular IPL sessions are required. Each brand advises on how often to use their machine, and when you can expect to see results. For more information, click here .