While the exact cause of rosacea isn’t fully understood, several factors are known to play a role in how it develops:
Everyone’s experience with rosacea is different, so identifying and avoiding personal triggers is an important part of managing it.
Rosacea Subtypes
Type 1: Flushing & Redness
The mildest form, marked by visible capillaries, sensitive skin, and redness triggered by sunlight, spicy food, or skincare products. Burning or stinging is common.
Type 2: Papular Rosacea
Persistent redness with acne-like bumps and pustules. Inflammation often makes the redness appear more intense.
Type 3: Ocular Rosacea
Affects the eyes, causing dryness, redness, and a gritty feeling. Eyelids may become red and scaly, needing specific care.
Type 4: Skin Thickening (Rhinophyma)
An advanced form where skin—especially on the nose—thickens and swells due to enlarged oil glands.
Rosacea is a chronic inflammatory skin condition caused by a combination of vascular, immune, and environmental factors. While the exact cause remains unclear, several key mechanisms explain the persistent redness, flushing, and sensitivity seen in rosacea.
1. Over-Reactive Blood Vessels
People with rosacea have facial blood vessels that dilate too easily. Heat, UV, alcohol, stress, or exercise trigger exaggerated flushing, leading to long-term redness and visible capillaries.
2. Immune System Overactivity
The innate immune system is heightened. Increased levels of inflammatory peptides (such as cathelicidins and KLK5) cause redness, swelling, and acne-like bumps.
3. Impaired Skin Barrier
A weakened skin barrier allows irritants to penetrate easily, making the skin more reactive and sensitive. This contributes to ongoing inflammation.
4. Microbial Imbalance (Demodex Mites)
People with rosacea have higher numbers of Demodex mites, which can trigger or worsen inflammation and sensitivity.
5. Neurovascular Sensitivity
Nerves that control facial blood vessels are over-responsive. This explains burning, stinging, and sudden flushing episodes.
6. UV Radiation
UV exposure drives vascular growth, collagen breakdown, and oxidative stress—making rosacea worse over time.
In Summary
Rosacea develops due to a mix of sensitive blood vessels, immune overactivity, a weakened skin barrier, microbial imbalance, and environmental triggers. This is why rosacea varies between individuals and requires a personalised approach to treatment.

While the exact cause of rosacea isn’t fully understood, several factors are thought to play a role:
Rosacea often begins with intermittent flushing but may gradually lead to more persistent and visible redness. As rosacea progresses, the skin can become increasingly sensitive and prone to reacting to skincare products, environmental shifts, or even diet and emotional stress. Without proper management, small visible blood vessels (telangiectasia) and acne-like bumps may develop. In some advanced cases, particularly in men, rosacea can lead to thickening of the skin on the nose, a condition known as rhinophyma.
A number of lifestyle and dietary habits can aggravate facial redness and trigger flushing episodes. These include:
A suitable routine for rosacea and redness-prone skin should prioritise gentle, barrier-strengthening products that soothe inflammation. Key recommendations include:
Several advanced treatments are available to help reduce the redness, flushing, and sensitivity associated with rosacea:
Yes — topical rosacea treatments can help reduce redness, inflammation, sensitivity, and flushing in many patients, although the degree of improvement depends on the subtype of rosacea and the degree of vascular involvement present.
Barrier dysfunction is extremely common in rosacea-prone skin, so moisturisers designed to restore the skin barrier are often an important part of treatment. Commonly recommended options include:
Rosacea management is often most successful when prescription therapy, barrier repair, trigger avoidance, skincare modification, and laser-based vascular treatments are carefully combined.
Rosacea-prone skin has a weakened skin barrier and an over-reactive neurovascular response, meaning even “normal” skincare products can trigger burning, flushing, redness, or irritation. The goal is to calm inflammation, protect the skin barrier, and minimise unnecessary stimulation.
ACC funding eligibility is determined by the Accident Compensation Corporation on a case-by-case basis. Approval is dependent on injury acceptance, clinical indication, and ACC policy at the time of application. Not all treatments offered at Scars & Lasers are ACC-funded. Private fees may apply for unfunded components of care.