Picosecond laser hair removal: what to know

Hair-removal lasers are selected to deliver energy to the hair follicle while limiting exposure to nearby skin. A picosecond device is designed around ultra-short pulses and may have different uses, so its name alone does not confirm that it is suitable for unwanted hair. Results also depend on hair colour, thickness, skin tone, body area and the growth cycle. Facial excess hair can have a hormonal cause, while shaving-related bumps or ingrown hairs may need a separate assessment.

Ask which device and wavelength will be used, and whether the clinician is treating hair or another skin concern. Disclose tanning, medicines, darker marks after irritation, cold sores and active rashes. Follow instructions about shaving and avoid waxing or plucking when advised, because the follicle needs to be present for laser targeting. After treatment, use gentle cleansing, avoid excess heat and friction, and protect exposed areas from sunlight.

Contact the clinic if redness spreads, pain intensifies, blisters appear, or treated follicles become increasingly swollen or pus-filled. Seek urgent help for facial swelling affecting breathing or eyesight. New widespread rash or severe skin darkening also warrants prompt review.

Which wavelength is appropriate for my skin and hair, and why? Could excess facial hair relate to hirsutism, and could my bumps be razor bumps or ingrown hairs? What preparation and aftercare do you recommend?