Electrolysis vs. Laser Hair Removal: What’s the Difference?
Let me start by saying I’m not anti-laser. Depending on the area you want to treat and your priorities (reduction or permanent removal), laser can be a good solution. But laser hair removal and electrolysis work very differently, and knowing how can save you time, money, and frustration.
How Laser Hair Removal Works
Laser hair removal uses heat to damage cells that contain a lot of pigment. Dark hair holds the most pigment, so it absorbs the most heat and passes it to the follicle, which stops hair from growing. A follicle has to be in its active growth stage for this to work. Because your follicles are all in different stages at any given time, more than one session is required to treat all your hair.
According to Cleveland Clinic, most people need six to eight treatments, spaced about six to eight weeks apart. After the first treatment, most people see roughly a 10% to 25% reduction in hair growth. After a full series, you may go several months or even years without new growth. It isn’t permanent, though. Some hair will grow back, usually lighter and thinner than before.
Because laser targets pigment, it needs contrast between your hair and skin. It works best on thick, dark hair and light skin. It may not work as well on blonde, gray, white, or red hair, or on darker skin.
How Electrolysis Works
Electrolysis doesn’t rely on pigment at all. A trained electrologist guides a very fine probe (the diameter of the hair or finer) into the opening of each individual hair follicle. A small electric current travels into the follicle and destroys it, preventing it from producing new hairs.
Like laser, electrolysis takes multiple sessions because every hair is on its own growth cycle. In my experience, you should budget about one to one and a half years of consistent treatment to permanently clear an area. How often you come depends on you and your electrologist. Many clients come every other week or monthly, and those with denser hair growth often come more frequently. Stay consistent with the schedule your electrologist recommends, and you’ll typically get the results you want.
Side by Side
Laser | Electrolysis | |
How it works | Heat absorbed by pigment damages the follicle | Electric current delivered through a fine probe into each follicle |
Best for | Dark hair contrasted on light skin | A wide range of hair colors and skin tones |
Permanent? | No, but lasts longer than shaving or waxing | Yes |
Number of treatments | About 6 to 8, spaced 6 to 8 weeks apart | Regular sessions over about 1 to 1.5 years |
What it feels like | A series of stings, like a rubber band snapping | Slight tingling, heat, or a pinch |
Where Laser Has the Edge
To be fair, laser has a real advantage when it comes to coverage. Cleveland Clinic lists fewer treatments as a benefit of laser over electrolysis, and unlike electrolysis, laser doesn’t have to treat each follicle one at a time, so it’s faster for reducing hair in large areas. If your priority is covering a large area quickly, and you have dark hair with light skin, laser may be the better fit.
The Laser Risk I See Most
There’s one laser risk I want to call out, because I see it often with clients who’ve had laser before coming to me. It’s called paradoxical hypertrichosis, and it’s the main reason I don’t recommend laser on areas like the face. There’s a possibility the laser will turn fine, light vellus “peach fuzz” into coarse, dark terminal hair. The new hair typically appears thicker, darker, and coarser than what was there before, and most people notice it within one to three months of treatment.
Overall, it’s uncommon. According to Simplicity Laser, a review pooling data from more than 9,700 patients found it occurred in about 3% of cases, mostly with facial and neck treatments, and in only 0.08% of non-facial cases. But the risk is higher for certain groups, so it’s worth knowing about before you start.
Who is at higher risk:
People treated on the face or neck, especially the upper lip, chin, and cheeks
People with darker skin tones and dark, thick hair
People with hormonal conditions such as PCOS/PMOS, nonclassical congenital adrenal hyperplasia, Cushing syndrome, or androgen-secreting conditions
People taking hormone supplements or corticosteroids
If you have a hormonal condition like PCOS, talk with your physician before starting laser.
If laser has already stimulated unwanted hair growth, Simplicity Laser notes that many dermatologists recommend electrolysis as the most reliable permanent option.
Where Electrolysis Shines
The biggest advantage is that electrolysis is permanent. It destroys the cells in the follicle that grow the hair, so the hair doesn’t come back, and Cleveland Clinic calls it the only FDA-approved method of permanent hair removal. It’s also effective on the widest range of skin and hair types, regardless of hair color or skin tone. When done by a certified professional, it’s very safe, with a very low risk of infection or scarring. The tradeoff is time. Electrolysis takes regular sessions over a longer period than laser, but at the end, you’re done.
So, Which Is Right for You?
If you have dark hair and light skin and want to reduce hair growth across a larger area in fewer visits, laser may be a good fit. If you want permanent removal, have blonde, gray, or red hair, have darker skin, or are treating your face, electrolysis is usually the better choice.
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