Active Growth Phase (Called The Anagen Phase); Degradation Phase (Catagen Phase); Resting Phase (Telogen Phase) - Rio Salon Laser User Manual

W W H H Y Y I I S S A A S S E E R R I I E E S S O O F F T T R R E E A A T T M M E E N N T T S S R R E E Q Q U U I I R R E E D D ? ?
Everyone's hair grows differently, depending on age, weight, metabolism, hormones, ethnicity, medications, and other factors. But all hair goes
through three distinct growth phases:

Active growth phase (called the anagen phase),

cells which form the hairshaft. In certain areas of the body, such as the scalp, the majority (83%) of the hairs are in this phase. During the Anagen
phase the hair has an abundance of melanin.

Degradation phase (catagen phase),

3–4% of our body hair is in this phase at any given time. The hair follicle shrinks at this time as the hair is prepared for eviction.

Resting phase (telogen phase),

is not treatable during this time.
Laser treatment is only effective when the hair is in the Active growth phase.
The performance of this product is affected by the number of growing hairs
in the treatment area. This is shown in the table opposite.
Also, not all hair follicles in the Active growth phase will be destroyed in a
single treatment. Some follicles are destroyed, others may be miniaturised
into vellus hairs (light fine hairs), and some enter prolonged dormancy. The
initial treatment should be repeated to take care of active hair follicles that
were not effectively treated in the first session as new hair growth is
observed, this will typically be some 2–4 weeks later depending on where
the treatment area is.
Further treatments should be planned to clear hairs that are coming out of
the resting phase and into the Active growth phase. Given the number of
hair follicles in the Resting phase at any given time this new hair re-growth
can be significant, therefore multiple treatments are required for long term
permanent hair reduction.
which lasts between 2 and 7 years. During this phase the dermal papilla actively produces
which lasts between 10 and 20 days, during which the hair stops growing but is not yet shed. About
which can last for several months, during which the hair falls out and a new hair begins to form. The hair follicle
Follicle
Body Site Density
per square cm
Face 350
Arms 80
Legs 60
Beard 500
Upper Lip 350
Armpit 65
Chest/Back 70
Pubic 70
9
Typical
Number of
Resting
Treatments
Time
6 2–3 months
4 2–3 months
4 6 months
6 6 weeks
6 6 weeks
4 2–3 months
4 2–3 months
4 2–3 months
Hairs in
Active
Growth
83%
79%
79%
30%
34%
69%
69%
71%