The Cycle - Rio Salon Laser User Manual

T T H H E E H H A A I I R R G G R R O O W W T T H H C C Y Y C C L L E E
It is important to understand the normal hair growth cycle to understand how the Salon Laser Hair Removal System works. The hair follicle is an
anatomical structure which evolved to produce and push out a hair shaft. Hair is made up of proteins called keratins. Human hair grows in a
continuous cyclic pattern of growth and rest known as the "hair growth cycle."

The Cycle

Three phases of the cycle exist:
Anagen = active growth phase
Catagen = degradation phase
Telogen = resting phase
Periods of growth (anagen) between two and seven years, are followed by a period in which the follicle is totally degraded. The resting phase
(telogen) then begins and lasts between six weeks and six months. Shedding of the hair occurs only after the next growth cycle (anagen) begins, and
a new hair shaft begins to emerge. On average 50–100 telogen hairs are shed every day. This is normal hair loss and accounts for the hair loss seen
every day in the shower and with hair combing. These hairs will regrow. The percentage of follicles in the resting phase (telogen) will vary at any time
depending on the body area. It is also important to note that a variety of factors can affect the hair growth cycle and cause temporary or permanent
hair loss (alopecia) including medication, radiation, chemotherapy, exposure to chemicals, hormonal and nutritional factors, thyroid disease,
generalised or local skin disease, and stress.
Anagen Catagen Telogen Early to mid Anagen Anagen
Growing Phase Involution Phase Resting Phase Regrowing Phase New Growing Phase