So, when you choose a centre for laser treatment, you should see whether the service provider is a medically trained professional who is also trained in laser medicine. A safe and professional treatment can only be provided by a laser-trained doctor who knows well the skin structure and functions, which type of laser, and what parameters should be used per your skin type and issue. 

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Aestheticians or cosmeticians cannot be well trained in laser treatments. They have a superficial knowledge of skin anatomy and physiology. Their understanding of physics and other sciences does not allow them to understand and use the lasers properly. They might do an empirical job, making you undergo significant risks during treatment and ending with bad, poor or insufficient results. These beauticians, turned overnight into laser specialists, will attract you with low prices because they can't provide quality. Please remember: "Cheap can become very expensive."