A current is delivered through an electrode which generates electromagnetic waves at the speed of light and these are called radio waves.
The human body acts as a conduit for the radio frequency energy and becomes part of the circuit which means when it means resistance heat is caused which can be used to stimulate collagen growth or remodelling. The radiofrequency penetrates deep into the skin to affect the dermis and subcutaneous layers.
In my clinic Multipolar RF are used. The more polars/electrodes the hand pieces has, the more deeply and the more widely the RF can penetrate. In this way you get faster more efficient treatments.
The treatment works in two ways
Anything that irritates the skin should be avoided prior to treatment and includes things like sunbathing. This is because they are more likely to be sensitive to the pain if they have active sun burn. Often women prior to the menstrual cycles can also have extra sensitivity on the skin.
Radiofrequency devices function independent of chromophores; they can be used on all skin types with little to no risk of pigment alteration.