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How Many Treatments For Laser Hair Removal

Approximately 3 to 5 weeks after the initial treatment, additional treatments are required to eliminate the remaining hair shafts. Depending upon hair type and genetic factors, some patients may require several additional treatments beyond these initial treatments. Almost all patients, even those with extremely persistent hair growth, will achieve permanent hair reduction after four or five treatments.

Multiple treatments depending on the type of hair and skin color have been shown to provide long-term reduction of hair. Most patients need a minimum of seven treatments. Current parameters differ from device to device but manufacturers and clinicians generally recommend waiting from three to eight weeks depending on the area being treated. The number of sessions depends on various parameters, including the area of the body being treated, skin color, coarseness of hair, reason for hirsutism, and gender. Coarse dark hair on light skin is easiest to treat. Certain areas (notably men’s faces) may require considerably more treatments to achieve desired results. Hair grows in several phases (anagen, telogen, catagen) and a laser can only affect the currently active growing hair follicles (anagen). Hence, several sessions are needed to kill hair in all phases of growth. This problem is countered by spacing appointments sufficiently so that inactive follicles will start to grow again. Laser does not work well on light-colored hair, red hair, grey hair, white hair, as well as fine hair of any color, such as vellus. For darker skin patients with black hair, the long-pulsed Nd:YAG laser with a cooling tip can be safe and effective when used by an experienced practitioner.

Usually treatments are spaced three to eight weeks apart depending on the body area and the hair cycle length for that area. The face usually requires more frequent treatments three to four weeks apart, whereas legs require less frequent treatments and patients should be advised to wait at least six weeks. Typically the shedding of the treated hairs takes about two to three weeks. These hairs should be allowed to fall out on their own and should not be manipulated by the patient.

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