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Laser hair removal treatment on a woman’s underarm performed by a technician in a Philadelphia med spa

Laser Hair Removal: Everything You Need to Know

February 17, 20263 min read

Laser hair removal is one of the most effective and popular treatments for long-term hair reduction. It offers a safe, convenient solution for unwanted hair on the face and body when performed by a trained professional. Below you will find everything you need to know before starting treatment.

Main difference

  • Alexandrite (755 nm) → works best on light skin + dark hair

  • Diode (800–810 nm) → works on a wider range of skin tones, especially medium/darker skin

Both remove hair long-term. The right choice depends on the person.

What Is Laser Hair Removal?

Laser hair removal uses concentrated light energy to target and damage the hair follicle. The pigment in the hair absorbs the laser energy, which reduces the follicle’s ability to grow hair in the future.

It hurts?

Laser hair removal is generally painless, though sensitivity varies by person. Small or sensitive areas like underarms or Brazilian may feel slight tingling or warmth. Modern lasers like Soprano and Candela use advanced cooling systems to make the procedure as comfortable as possible.

Is It Permanent or Temporary?

Laser hair removal provides long-term hair reduction, not 100% permanent removal.

Most clients experience a significant decrease in hair growth, and the hair that does return is usually finer and lighter. Maintenance sessions may be needed once or twice a year.

How Many Sessions Are Needed?

Hair grows in cycles, and the laser is most effective during the active growth phase. Because not all hairs are in the same phase at the same time, multiple sessions are required.

• On average: 6–8 sessions

• Sessions are spaced about 4–6 weeks apart for body areas

• Facial areas may require treatments every 4 weeks

Some individuals may need additional sessions depending on hormones, hair thickness, and treatment area.

Pre-Care Instructions (Before Treatment)

To ensure safe and effective results:

  • Avoid sun 7 days

• Do not wax, pluck, or thread for 3–4 weeks before treatment (shaving is allowed)

• Shave the area 24 hours before your appointment

• Avoid retinol or strong exfoliants in the treatment area for several days

• Do not apply lotions, oils, or deodorant on the day of treatment

• Inform your provider about medications

Aftercare Instructions (After Treatment)

Proper aftercare reduces irritation and improves results:

•Avoid sun 7 days

• Use SPF 30+ daily

• Avoid hot showers, saunas, and intense workouts for 24–48 hours

• Do not wax or pluck between sessions

• Gently exfoliate after a few days to help shedding

• Apply soothing aloe vera or calming cream if needed

Possible Side Effects

Most side effects are mild and temporary:

• Redness

• Mild swelling around hair follicles

• Sensitivity similar to a light sunburn

• Temporary skin irritation

These usually resolve within a few hours to a couple of days.

Rare Side Effects

• Hyperpigmentation or hypopigmentation

• Blistering (very rare)

• Burns (if performed incorrectly)

Choosing an experienced provider significantly reduces these risks.

Contraindications (When to Avoid or Postpone Treatment)

Laser hair removal may not be recommended if you have:

• Pregnancy (as a precaution)

• Active skin infections or open wounds

• Recent tanning or sunburn

• Certain photosensitive medications

• Severe skin conditions in the treatment area

• History of keloid scarring

• Active herpes outbreak (for facial areas)

A professional consultation is always required before starting treatment.

Important Considerations

• Results vary depending on hair color and skin type

• Dark hair responds best to laser treatment

• Hormonal conditions (like PCOS) may require maintenance sessions

• Consistency is key for optimal results

Final Thoughts

Laser hair removal is a safe and effective solution for long-term hair reduction when performed properly. With the correct number of sessions, proper preparation, and good aftercare, clients can enjoy smoother skin and reduced hair growth for years.

A personalized consultation will help determine if laser hair removal is right for you and create a treatment plan tailored to your goals.


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