Knowra Laser hair removal Laser hair removal Laser hair removal uses concentrated light to heat and damage hair follicles, reducing future hair growth. Multiple treatments are usually needed because follicles respond best during active growth.
Selective photothermolysis : A light-based treatment principle that targets structures by matching wavelength, pulse duration, and energy to their optical and thermal properties. Laser hair removal uses this principle to heat follicles while limiting injury to surrounding skin.
Long-pulsed Nd:YAG laser : A near-infrared laser with a 1064-nanometer wavelength, used in dermatology for deeper targets and darker skin types. Its wavelength is less strongly absorbed by epidermal melanin than shorter-wavelength hair-removal lasers.
Paradoxical hypertrichosis : Unexpected increased hair growth after light-based hair removal, sometimes appearing near treated areas. This uncommon adverse outcome complicates treatment planning, particularly for some facial areas and skin types.
Waxing : A hair-removal method that pulls hair from the follicle using adhesive wax. Waxing removes existing hairs temporarily; laser treatment aims to reduce future growth.
Melanin : A family of pigments that absorb light and help determine the color of skin and hair. Follicular melanin absorbs laser energy, making hair pigment central to treatment response and risk.
Alexandrite laser : A laser that emits light near 755 nanometers, used in dermatology and other applications. Its wavelength is efficiently absorbed by melanin, making it useful for suitable lighter skin and dark hair.
Post-inflammatory hyperpigmentation : Darkening of skin that follows inflammation or injury and results from increased pigment production or distribution. Thermal injury from treatment can trigger pigment changes, especially in more melanated skin.
Shaving : A hair-removal method that cuts hair shafts at the skin surface without destroying follicles. Shaving changes visible hair immediately but does not target the follicle or reduce its growth.
Hair follicle : A skin structure that produces and anchors a hair shaft. Follicular structures are the targets that treatment heats and damages.
Diode laser : A semiconductor laser commonly used for hair reduction, typically emitting near-infrared light. Diode systems offer wavelengths and delivery formats used across a range of hair-removal treatments.
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