Photo above for demonstration purposes only. Similar devices are used in photodynamic therapy for acne.
Jump to:
- What is photodynamic therapy (PTD)?
- The pros and cons of photodynamic therapy (PTD) to treat acne
- What is acne laser therapy?
- The pros and cons of laser therapy to treat acne
- Acne laser therapy is the clear winner over photodynamic therapy
Are you looking for a light-based acne solution in Vancouver? Our acne laser treatments in Surrey may be a fit for you!
Recently, there have been newer treatments available to solve or reduce acne, for both mild and severe cases. Namely, these are light-based technologies, using either photodynamic therapy (PTD) or laser therapy.
While PTD and laser therapy can seem like similar treatments, they come with distinct differences.
In this article, we’ll explain the pros and cons of each of these light-based acne treatments.
What is photodynamic therapy (PTD)?
Photodynamic therapy is a treatment of light-sensitizing prescriptions combined with specific types of light. It addresses concerns ranging from acne to infections, psoriasis, sun damage and even cancer.
This combination works better than light alone, since the two create a special reaction (oxidization) to be able to kill bacteria or targetted cells.
The prescriptions used to sensitize the skin to light in PTD include aminolevulinic acid (ALA) and methyl aminolevulinate (MAL).
What happens before a photodynamic therapy (PTD) session?
Days before a treatment session, a patient may be asked to follow pre-procedure protocols. These may include staying out of the sun, or avoiding routine acne treatments (such as using isotretinoin).
What happens during a photodynamic therapy (PTD) session?
Before performing PTD, a service provider may perform microdermabrasion on the treatment area. This removes dead skin cells that don’t need treatment, and enhances the absorption of topical light sensitizers.
The light sensitizer is either taken orally, through the venous system or applied topically. When treating acne, the method is usually topical.
After an in-office waiting period (which can take hours, depending on the case), the prescribed light form is then beamed onto the affected area for under 10 to 60 minutes.
The type of light used in photodynamic therapy can include light emitting diodes (LEDs) of red or blue light, intense pulsed light (IPL), or laser light. In some cases, sunlight may also be used (though this is rare for acne).
What happens after a photodynamic therapy (PTD) session?
Post-treatment protocols for photodynamic therapy include staying out of the sun for up to five days. Since the skin will have become extremely sensitive to light, even sunscreen will not be enough protection from the sun during this recovery period. Not following these instructions can result in sun burns or long-term sun damage.
Results begin to show weeks or months after a series of treatments. Treatments must be repeated for up to five sessions at a time, in order for the treatment to work.
The pros and cons of photodynamic therapy (PTD) to treat acne
Photodynamic therapy comes with both pros and cons.
The pros of photodynamic therapy are that:
- It controls the production of sebum by regulating the sebaceous glands.
- It has shown about 30 – 70% effectiveness in reducing acne.
- It kills P. acnes bacteria (one of the causes of acne).
- It can be selective in its target, leaving healthy skin untouched (for cases like cancer treatments).
- It doesn’t require long-term prescriptions.
The cons of photodynamic therapy include:
- Pain during treatment. The photosensitizers can produce a burning sensation on the skin.
- Short-term common side effects such as redness, swelling, dryness, peeling, crusting, etc.
- The potential for long-term side effects like post-inflammatory hyperpigmentation. This can especially happen with continued light exposure (such as from the sun’s UV rays).
- It doesn’t work on non-inflammatory acne.
- Treatment sessions are very time consuming.
- Post-procedure instructions include staying indoors for multiple days, which can be inconvenient.
- Treatments may need to be repeated to continue to be effective.
It is also of note that, as of early 2023, most photodynamic therapy treatments are not FDA cleared. The one exception is the BLU-U® system. However, the BLU-U® system is not FDA cleared to treat acne along with light sensitizers. The light treatment, on its own, offers roughly 64% effectiveness according to this study, and this study. Multiple treatment sessions are needed.
What is acne laser therapy?
Acne laser therapy is a light based treatment for acne using laser wavelengths.
A multipurpose, 1064 nm ND:Yag laser can be used in medical aesthetic clinics to reduce acne breakouts. Tools like BroadBand Light (BBL™) can also be used (though this is not a laser).
Settings on an ND:Yag laser must be designed specifically for treating acne by targeting the sebaceous glands.
This technology works by heating up the sebaceous glands with laser energy. By doing so, sebaceous glands are down-regulated to produce less oil. They also kill the p. acnes bacteria.
What happens before an acne laser treatment?
Weeks before a laser acne treatment, patients may be asked to stay out of the sun, and to stop other acne treatments, especially if they are skin irritants (such as astringents or retinols).
Patients will be asked to come to their sessions clean shaven, if they have facial hair.
What happens during an acne laser treatment?
During a laser acne treatment, the face will be wiped with acetone, alcohol or another cleaner.
No anaesthetic is needed for laser acne treatments. The laser can get to work right away.
Sections of skin will be pulsed bit-by-bit, until the entire face has been in contact with the laser beam. This takes about 30 minutes.
Afterwards, a broad-spectrum, high SPF will be applied.
What happens after an acne laser treatment?
There is no downtime associated withlaser acne treatments. Patients can go back to their normal activities right away.
However, patients will be asked to continue to reapply broad-spectrum SPF 30 or higher every two hours. A typical, at-home skin cleansing and moisturizing routine will also be recommended.
Results become visible starting four weeks after the last treatment. An initial series of repeat treatments will be necessary. The exact number of treatments required can depend on each person’s skin and severity of acne.
Results are expected to gradually improve over the months following the treatments. Thereafter, maintenance treatments may be necessary.
The pros and cons of laser therapy to treat acne
Acne laser therapy also comes with pros and cons.
The pros of acne laser therapy are that:
- It controls the production of sebum by regulating the sebaceous glands.
- It works long term, on current and future break outs.
- It doesn’t require any prescriptions.
- It works on mild, moderate and severe acne.
- Treatment sessions last roughly 30 – 60 minutes.
- It does not require any anaesthetic to relieve pain during treatment.
- It doesn’t require any downtime – patients can go back to normal activities right away (as long as they apply sunscreen every 90 minutes and avoid hot environments).
The cons of acne laser therapy include:
- Short-term common side effects such as redness and swelling.
- The potential for rarer side effects such as dryness, peeling, crusting and hyperpigmentation. All side effects are temporary, though they sometimes require additional post-treatment care.
- There is a chance that acne will get worse before it gets better after treatments.
Acne laser therapy is the clear winner over photodynamic therapy
As we’ve seen above, photodynamic therapy for acne is extremely time consuming and painful. It does not work on inflamed acne.
On the other hand, acne laser therapy is tolerable and requires no pain aversion techniques (though it is not without any pain). It works on mild, moderate or severe acne.
Acne laser therapy is also prescription-free.
Both light-based acne treatment options require careful sun care after sessions. However, photodynamic therapy requires staying indoors for days. Meanwhile, laser treatments only require using sunscreen diligently.
Based on the above comparisons, laser acne therapy is the much easier and more effective method for treating acne.
Are you looking for a light-based acne solution in Vancouver? Our acne laser treatments in Surrey may be a fit for you!
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