Red spots that remain on the skin long after inflammatory lesions have healed can be just as bothersome as acne itself. Often mistakenly called discolouration, they actually represent a completely different vascular problem. Instead of masking them with foundation or irritating the skin with aggressive exfoliation, it is worth looking at a treatment that works directly with the vessels. Broad-spectrum phototherapy is non-invasive support that can calm inflammatory lesions and gradually reduce the visibility of post-inflammatory erythema. It is not, however, a causal therapy for acne and does not replace treatment led by a doctor.
Why are red acne spots (PIE) so difficult to remove?
Post-inflammatory erythema (PIE) occurs due to damage and dilation of tiny blood vessels where inflammation took place. Classic brightening cosmetics (e.g., based on kojic acid or arbutin) target the skin pigment - melanin, making them ineffective for vascular spots. Broad-spectrum light targets haemoglobin (the red pigment of blood), which causes the vessels to constrict and the red tone to fade gradually. The pace and extent of improvement are individual and usually require a series.
| Feature | Post-inflammatory erythema (PIE) | Post-inflammatory hyperpigmentation (PIH) |
|---|---|---|
| Colour | Red, pink, purple | Brown, dark beige, black |
| Cause | Dilated, damaged capillaries | Excess pigment (melanin) |
| Main target for light | Haemoglobin (blood pigment) | Melanin (skin pigment) |
How does broad-spectrum light affect active acne?
Broad-spectrum IPL/IPDL phototherapy works on several fronts in anti-acne treatment. Using selected cut-off filters, the device emits light at a wavelength that reacts with porphyrins, compounds produced by Cutibacterium acnes bacteria present in the sebaceous follicles. This reaction generates singlet oxygen, which reduces the number of anaerobic bacteria while sparing the surrounding tissue. In parallel, the light energy can calm inflammation and support epidermal regeneration. Acne has many causes, including hormonal ones, so light is a supporting measure rather than a standalone treatment.
Advantages of the treatment and what to expect
The treatment is non-invasive and does not require time off from daily duties - it is a classic “lunchtime” procedure. During the procedure, a cool gel is applied to the skin, and the cosmetologist moves the handpiece emitting light flashes. The sensations are minimal and limited to brief impulses of warmth, which is thanks to the modern contact cooling system. After the treatment, mild, transient redness may appear, disappearing within a few hours. For optimal results, a series of 3-4 treatments at intervals of 3-4 weeks is recommended, following a prior cosmetology consultation. In the Studio AP offer this corresponds to acne treatment support, in a cheeks or full-face option.
Frequently asked questions
Does broad-spectrum phototherapy dry out the skin?
Usually not. Unlike strong acids, broad-spectrum light does not break the continuity of the epidermis and acts selectively on bacteria and vessels, so tightness and peeling are uncommon. In people with a weakened hydrolipid barrier the skin may still react with temporary dryness, which is why we use regenerating care and photoprotection after the treatment.
Can I apply makeup after the treatment?
It is recommended to wait at least 24 hours before applying traditional foundation to allow the skin to regenerate calmly. Immediately after the treatment, a soothing cream and high photoprotection are applied to protect the newly exposed areas.
