Inside a PRP Session: What Really Happens to Your Skin, Step by Step

If you have acne scars, you may have heard of PRP but still wonder what actually happens during the treatment. Is blood really taken from your arm? How is it prepared? Does it go back into your skin through injections, microneedling, or both?

A PRP procedure for acne scars can sound more complicated than it actually is. PRP stands for platelet-rich plasma, which is prepared from a small sample of your own blood. It contains a concentrated number of platelets and growth factors that may support the skin’s natural repair processes.

But before you picture a dramatic medical procedure, here is the reality: a typical session involves a blood draw, preparation of the PRP, skin preparation and then application or injection of the PRP, depending on the treatment plan.

So, let’s walk through a PRP procedure for acne scars from beginning to end so you know what your skin actually experiences during the appointment.

First: Your skin is assessed

A good PRP procedure for acne scars should not begin with a needle. It should begin with an assessment.

Your doctor will look at the type, depth and distribution of your acne scars. This matters because not every scar responds in the same way to every procedure.

For example, atrophic scars such as rolling, boxcar and some ice-pick scars may require different approaches. Your doctor may also consider whether you have active acne, pigmentation, sensitive skin or a tendency towards post-inflammatory pigmentation.

This is also the stage where you can discuss your expectations. PRP is generally used as part of a scar-treatment plan rather than as a magic eraser for old scars.

Research has found potential benefits when PRP is combined with procedures such as microneedling or laser treatment, although the quality of evidence is still variable and there is no single standard PRP protocol for acne scars.

 

Step 1: Your face is cleansed

Before the PRP procedure for acne scars begins, the treatment area is thoroughly cleansed.

The aim is simple: remove make-up, sunscreen, oil and other products from the skin so that the treatment can be performed under clean conditions.

Your doctor may then mark or examine particular scarred areas more closely before proceeding.

This part may feel very ordinary, but proper skin preparation is an important part of any procedure involving needles or skin penetration.

Step 2: A small amount of blood is taken

This is the part most people are curious about.

For a PRP procedure for acne scars, a small sample of your own blood is collected, usually from a vein in your arm, much like a routine blood test.

You may feel a quick pinch when the needle goes in. The amount of blood collected depends on the PRP system and the treatment plan.

And yes, the blood really is yours. PRP is an autologous treatment, meaning the material used for the procedure comes from your own blood.

Once the sample has been collected, it is ready for the next stage.

Step 3: Your blood is processed

Now comes the clever part of the PRP procedure for acne scars.

The blood sample is placed into a specialised tube or preparation system and processed to separate its different components. Centrifugation is commonly used to help separate plasma and blood cells according to their density.

The goal is to obtain platelet-rich plasma.

Why the focus on platelets?

Platelets are involved in the body's natural healing process and contain various growth factors and signalling molecules. These are thought to contribute to tissue repair and regeneration.

However, PRP is not simply a case of “more platelets = better skin”. Different preparation methods can produce PRP with different platelet concentrations and cellular components. This is one reason why PRP studies can be difficult to compare.

Step 4: Your skin is numbed

Depending on how the PRP procedure for acne scars is being performed, a topical numbing cream may be applied before treatment.

This is particularly useful if microneedling or multiple injections are planned.

The cream usually needs some time to work, so this can be the quietest part of your appointment. You may simply sit back and wait while the skin becomes comfortably numb.

Even with numbing, you may still feel some pressure, vibration or small pricks during the procedure.

The experience varies from person to person and also depends on the technique being used.

Step 5: The PRP is applied or injected

This is where the actual PRP procedure for acne scars can look different from one person to another.

There is no single way to administer PRP for acne scars.

In some treatment plans, PRP is applied to the skin during or after microneedling. Microneedling creates controlled micro-injuries in the skin, stimulating a wound-healing response and collagen remodelling.

In other cases, PRP may be delivered through small intradermal injections.

Your doctor may also combine PRP with another scar-treatment procedure, depending on your scar type.

Studies have reported improved scar outcomes when PRP is combined with microneedling compared with microneedling alone. A meta-analysis of controlled studies involving 472 patients found better clinical improvement with the combination, although individual treatment protocols varied.

So, when someone asks how PRP is done for face, the answer is: it depends on the technique selected for their skin and scars.

Step 6: Your skin may look red afterwards

Immediately after a PRP procedure for acne scars, your face may not look particularly glamorous.

You may notice redness, mild swelling, tiny pinpoint marks or a warm, tight sensation. If microneedling has been performed, the skin can look similar to a mild sunburn for a short period.

Don't panic when you look in the mirror.

Your skin has just undergone a controlled procedure, so some temporary redness is expected.

The intensity and duration of these effects depend on the technique used, your skin and how aggressively the treatment was performed.

Interestingly, some reviews have reported shorter periods of redness and crusting when PRP was added to certain acne-scar procedures, although the overall evidence remains limited.

Step 7: The healing process begins

The most important part of the PRP procedure for acne scars actually happens after you leave the clinic.

Your skin now begins its repair process.

If microneedling has been used, the controlled micro-injuries stimulate the skin's wound-healing response. PRP may provide additional growth factors and signalling molecules that can support this process.

Over time, collagen remodelling can gradually improve the appearance and texture of acne scars.

But this is not an overnight change.

Collagen does not appear in your skin immediately after one appointment. Skin remodelling takes time, which is why acne-scar treatments are generally assessed over weeks and months rather than the next morning.

What does PRP feel like during the procedure?

One of the most common questions about a PRP procedure for acne scars is whether it hurts.

The honest answer is: you may feel some discomfort, but the level varies.

The blood draw usually feels like a quick needle prick. Numbing cream can make the facial part of the treatment more comfortable. During microneedling or injections, you may notice tiny pricks, pressure, warmth or vibration.

Areas with thinner skin or more sensitive nerve endings may feel more uncomfortable.

Your comfort should be discussed with the treating doctor rather than simply trying to “tolerate” the procedure.

What should you do after treatment?

After a PRP procedure for acne scars, your skin needs some breathing space.

Your doctor will give you specific aftercare instructions depending on the technique used. Generally, you should avoid unnecessarily irritating the skin immediately after treatment.

This can mean being careful with strong active ingredients, excessive heat, vigorous exercise or anything else your doctor specifically advises you to avoid.

Sun protection is also important. Freshly treated skin can be more vulnerable to irritation, and protecting your skin from UV exposure is an important part of managing acne-scar treatment.

Do not start adding multiple new skincare products immediately after your appointment. More products do not necessarily mean faster healing.

How many sessions might you need?

There is no universal number of sessions for a PRP procedure for acne scars.

The number depends on factors such as scar type, severity, the treatment technique and whether PRP is being combined with another procedure, usually from four to six sessions in total.

Some clinical studies have used multiple sessions spaced several weeks apart, but protocols vary considerably.

This lack of standardisation is one of the limitations of the current evidence. An overview of systematic reviews found that PRP research for acne scars differs substantially in preparation methods, treatment schedules and outcome measurements. The authors concluded that the certainty of evidence remains low or very low.

That means your treatment plan should be based on your individual skin rather than copying somebody else's number of sessions.

When will you see a difference?

After a PRP procedure for acne scars, your skin may initially look red or slightly swollen. That immediate appearance is not the final result.

As the skin settles and collagen remodelling takes place, changes in texture may become more noticeable gradually.

It is also important to have realistic expectations. PRP may help improve the appearance of acne scars, but it does not mean every scar will completely disappear.

A systematic review and meta-analysis found that combining PRP with procedures such as microneedling or subcision can improve scar-severity outcomes compared with the procedure alone. However, researchers have also highlighted limitations in the quality and consistency of available evidence.

Is PRP suitable for everyone with acne scars?

Not necessarily.

A PRP procedure for acne scars should be considered after your skin has been properly assessed.

If you have active, inflamed acne, your doctor may want to control the acne before focusing heavily on scarring. The type of scar also matters because different scars may respond differently to different procedures.

Your medical history, medications, tendency to develop abnormal scars and overall skin condition should also be considered.

This is why PRP should be performed by an appropriately trained medical professional rather than treated as a simple facial treatment.

So, what really happens to your skin?

A PRP procedure for acne scars is essentially a process built around your body's own healing mechanisms.

Blood is collected, processed to obtain platelet-rich plasma, and then used as part of a carefully planned skin procedure. Depending on your treatment, it may be combined with microneedling, injections, subcision or another scar treatment.

The procedure itself may take less time than you expect, but the biological changes afterwards are much slower.

And that is perhaps the most important thing to understand about the PRP procedure for acne scars: the treatment happens during your appointment, but the skin's remodelling process continues afterwards.

PRP is promising, particularly when used alongside other acne-scar treatments, but it is not a guaranteed cure and the research is still evolving. Current systematic reviews support further high-quality research before firm conclusions can be made about exactly when, how and for whom PRP works best.

If you're considering a PRP procedure for acne scars, the most useful first step is not booking the procedure blindly. Get your scars assessed, understand which technique is being recommended, ask what type of PRP will be used and find out what results are realistic for your particular skin.

That way, you know exactly what is happening to your skin — before, during and after the needle ever touches it.

References

1. https://pubmed.ncbi.nlm.nih.gov/37677095/ 

2. https://pubmed.ncbi.nlm.nih.gov/32061047/ 

3. https://pubmed.ncbi.nlm.nih.gov/30742878/