In general, higher-delivered laser fluences lead to better laser hair removal results. However, the higher the utilized fluence, the greater the discomfort and risk of complications. The effective fluence for any one area of hair is determined mainly by hair color, whereas the tolerated fluence is determined mainly by skin color.
The tolerance fluence can be increased substantially by various means, such as cooling the skin surface before, during, and/or after the optical pulse.
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