How long does laser take?
Two different questions hide inside this one. A single session is quick — five minutes for a lip, up to about 45 for full legs or a back. The full course takes longer: six to eight sessions spaced four to six weeks apart, so most people reach a settled result over roughly six to ten months. The spacing isn’t padding — it’s dictated by how your hair grows.
In short
- Per session: minutes. Lip or underarms ~5 min; bikini or half leg 15–20; full legs or back 30–45.
- Full course: months. 6–8 sessions, 4–6 weeks apart — usually 6–10 months end to end.
- The gaps are deliberate. Laser only works on hair in its growth phase, so sessions are spaced to catch each cycle.
- Face is faster-cycle (often 4 weeks apart); body areas are spaced a little wider.
- Hormonal hair takes longer — a few extra sessions and ongoing top-ups.
A single session: quick
The actual laser part is faster than the journey to the clinic for most areas.
Because the laser fires in rapid overlapping pulses as it glides over the skin, the time comes down to how much surface area there is. Small areas are done in the time it takes to read this paragraph; large areas take the length of a coffee break. Add a few minutes each side for prep and aftercare.
Rough treatment time by area
Confirmed at your consultation. First sessions can run slightly longer as settings are dialled in.
The full course: months, by design
Here’s the part people underestimate. Laser only damages a follicle that’s in its active growing phase, and at any moment only a portion of your hair is in that phase. So a course is deliberately spread out — each session catches a fresh batch of follicles as they enter growth. Rushing the sessions closer together doesn’t speed up results; it just treats fewer active follicles each time.
First session to finished course
Sessions 1–2. First treatments; hair sheds over the following weeks, then some regrowth as new follicles wake.
Sessions 3–4. Visible thinning; regrowth slower and finer between visits.
Sessions 5–6. Major reduction banked; what remains is sparse.
Course complete. Settled result; occasional top-ups for any hormone-driven stragglers.
Why the timeline varies
Two things stretch or shorten your course. Area: facial hair cycles faster, so those sessions are often four weeks apart, while legs and backs sit closer to six. Hair type: coarse dark hair on light skin responds fastest, while hormonally-driven hair (such as with PCOS) usually needs a few extra sessions and ongoing maintenance. Your exact session count is estimated at your consultation.
Think of laser as a course, not an appointment. The sessions are short; the patience is the price. Get the spacing right and the result looks after itself.
Planning around life
Because sessions are short and have no downtime, most City workers slot them into a lunch break. The main planning point is the calendar: start well before a holiday or big event so you complete enough of the course to see a difference, and remember to avoid sun and fake tan around each session. If you’re in the City of London, we’ll map your timeline at a free consultation at our Aldgate clinic.
Common questions.
How long does one laser hair removal session take?
How long does a full course of laser take?
Why do I have to wait weeks between sessions?
How soon will I see results?
Can I finish faster if I book sessions closer together?
Map your timeline.
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