What Happens During a Microneedling or PRP Session
What actually happens during a microneedling session compared with a PRP session?
Both appointments end with hundreds of tiny punctures in your scalp, but from the chair they feel like two different days. Needling is one continuous procedure that runs from numbing cream straight through to the pen. A plasma session drops a small laboratory step into the middle of your visit, and that one difference drives nearly everything else about how the two compare.
| What you're comparing | Microneedling | PRP |
|---|---|---|
| Chair time | 45 to 60 minutes | 60 to 90 minutes |
| Numbing | Topical cream, 20 to 30 minutes | Topical, often plus cold air or a ring block |
| Core step | Pen at 0.5 to 1.5 mm, 10 to 20 minutes | Draw 15 to 60 mL, spin 5 to 15 minutes |
| What goes in | Nothing, just the channels | 3 to 8 mL of concentrated plasma |
| Sensation | Sustained scrape | Sharp stings with a pressure ache |
A microneedling session runs 45 to 60 minutes of which only 10 to 20 is needling at depths of 0.5 mm to 1.5 mm, while a PRP session runs 60 to 90 minutes because a 15 to 60 mL blood draw and a 5 to 15 minute centrifuge spin sit in the middle of it.
What does a typical microneedling appointment involve from check-in to walking out?
Most of a needling appointment isn't needling. You'll spend twenty to thirty minutes sitting with cream on your head, and the pen work itself is over in ten to twenty. Knowing that up front stops you wondering why nothing much seems to be happening.
- Check-in and photos: Medication review, recent scalp history, consent, and standardised photographs under fixed lighting so density can be compared next visit.
- Prep: The scalp is degreased and disinfected with a chlorhexidine or alcohol-based prep, and hair is clipped into sections so the skin is reachable.
- Numbing: A compounded lidocaine cream sits under occlusion for roughly twenty to thirty minutes. This is the bulk of your appointment.
- The passes: The pen is held perpendicular and moved in overlapping horizontal, vertical and diagonal passes, dialled shallower at the temples and hairline, deeper over the vertex.
- Endpoint and finish: Even pinkness with fine pinpoint bleeding, then a bland serum, an aftercare sheet and your next booking.
The anaesthetic accounts for 20 to 30 minutes of a needling appointment and the needling itself for only 10 to 20, with the practitioner working to a visible endpoint of uniform erythema and fine pinpoint bleeding rather than to a clock.
What extra steps does a PRP session add because blood has to be drawn and processed?
Every extra minute in a plasma appointment sits between the needle going into your arm and the needle going into your scalp. None of that gap is filler. The steps inside it are also why two clinics using identical words can be injecting quite different products.
- The draw: Roughly 15 to 60 mL from the antecubital vein into tubes pre-loaded with sodium citrate or ACD-A, which keeps the platelets from activating early.
- The spin: Balanced tubes separate by density. One soft spin of about five minutes gives you more volume at lower concentration; a second harder spin pellets the platelets so the platelet-poor plasma can be discarded.
- The yield: Typically 3 to 8 mL of usable plasma, with recommended targets sitting around three to five times your baseline.
- The injections: A 27 to 30 gauge needle deposits a fraction of a millilitre per point, in a grid spaced about a centimetre apart at follicle depth.
Processing adds about 15 to 25 minutes to a plasma appointment, turning a 15 to 60 mL draw into 3 to 8 mL of concentrate, and because there's no standardised protocol, reported concentrations vary widely between methods and between patients.
How much does each procedure hurt, and how is discomfort managed?
Neither procedure is severe, but they're uncomfortable in ways that don't resemble each other. Needling is a dull, continuous scrape; injections are a run of sharp stings with a pressure ache behind them. If you're having both in one sitting, the thing that catches people out is that the sensation changes character halfway through.
| Pain profile | Microneedling | PRP injections |
|---|---|---|
| Character | Continuous dull scrape, like coarse sandpaper | Intermittent sharp sting, then a tight pressure ache |
| Sore spots | Temples, frontal hairline, bony prominences | Every entry point, plus a brief burn as fluid enters |
| Numbing that works | Topical cream, reliably | Topical plus cold air, vibration, ice or a ring block |
| Afterwards | Diffuse sunburn tenderness for a few days | Deeper ache and forehead swelling peaking next morning |
Topical anaesthetic performs noticeably better for needling than for injections, because the cream numbs the superficial layers the pen works in while an injection needle passes through to a depth the cream never reached.
How long does each appointment take from start to finish?
Booked time and treatment time aren't the same number, and the gap between them surprises people. Plan your day around the redness rather than the appointment, because the chair time is short and the visible aftermath is what actually constrains the rest of it.
A microneedling appointment is normally blocked for 45 to 60 minutes and a plasma appointment for 60 to 90, and overlapping the numbing wait with the centrifuge spin is the single biggest factor in whether a combined session takes 90 minutes or two hours.
What devices, needles, and depth settings are used in each treatment?
Two different needle technologies are at work in a combined visit, and they aren't interchangeable. A pen stamps straight in and straight out along the same axis so the channel stays clean, while a manual roller drags in at one angle and out at another, which tears the entry point and is why clinical practice moved away from rollers on the scalp.
- Pen cartridge: 9 to 36 needles, vertical stamping, commonly quoted from around 100 cycles per second upward.
- Scalp depth: 0.5 mm to 1.5 mm, tuned down at the temples and hairline, up over the vertex.
- Injection needle: 27 to 30 gauge on a 1 mL syringe, sometimes a blunt microcannula instead.
- Single use: Cartridges, needles, syringes and tubes are discarded in front of you.
Scalp needling depth typically sits between 0.5 mm and 1.5 mm with a clinical endpoint of mild erythema or pinpoint bleeding, and in the United States the FDA treats a microneedling product as a medical device once it penetrates the epidermis and dermis.
How does the scalp look and feel in the hours right after each session?
Expect your scalp to look worse than it feels. Straight after needling the treated skin is uniformly pink to red, warm and mildly swollen, and on deeper skin tones that reads more as a dusky darkening than a flush. Injections give you less overall redness but a heavier, deeper ache and a surprise or two the next morning.
Needling leaves uniform redness that fades over a few days, while injections leave small weals that settle within an hour plus next-morning forehead puffiness as fluid migrates downward, which is a well-recognised self-limiting effect rather than a complication.
What are the aftercare rules in the days following each treatment?
Aftercare for both procedures rests on one idea: you've got thousands of open channels for roughly a day, so anything you wouldn't want under your skin stays off it until they close. Get the first twenty-four hours right and the rest is mostly patience.
Washing pauses for about 24 hours and chemical services wait a week or more, and the one restriction unique to plasma is NSAIDs, which blunt platelet function for roughly eight to 48 hours, making paracetamol the usual substitute.
What happens when microneedling and PRP are performed in the same appointment?
Running both in one visit is now the common protocol rather than the exception, and the order is what makes it work. Your blood gets drawn while the numbing cream is going on, so the centrifuge spins through the wait instead of adding to it.
- Draw first: Blood comes off the arm as the anaesthetic goes on, so the spin and the numbing wait happen at once.
- Needle the scalp: The pen works the full field while the plasma is being prepared.
- Deliver the plasma: Inject the volume into the dermis in a grid, spread it topically over the freshly needled surface, or split it between the two.
- Budget for the overlap: Plan on 90 minutes to two hours, and expect more redness and a longer sore period than either procedure alone.
Injecting places a known volume at a known depth, while topical application relies on channels that begin closing within minutes, so the topical route is generally treated as an add-on rather than a substitute for injection.
How often is each session repeated, and how does a full course of treatment unfold?
Booking one session isn't really starting. Both treatments are governed by the hair cycle rather than by how your scalp feels, which is why the waiting isn't negotiable and the results calendar runs months behind the appointment calendar.
Clinical improvement typically appears across three to six months and maintenance then runs one session every three to six months, and because neither procedure alters the underlying cause of pattern hair loss, gains fade and the scalp drifts back toward its untreated trajectory once maintenance stops.
What signs during or after a session mean something has gone wrong?
Serious problems are uncommon with either procedure in trained hands, which is exactly why the warning signs are worth naming rather than assuming they'll be obvious. Pain is your most useful single indicator, because its trajectory is what tells you which kind it is.
Treatment soreness is diffuse and decreases day on day, so pain that's localised, increasing, or waking you at night is out of pattern, and spreading redness with pustules, yellow crusting or fever in the days afterwards points to infection rather than normal healing.
