These signs that you may confuse: Acne or Rosacea?
Persistent redness, inflammatory pimples, sensitive skin: these skin symptoms can cause confusion between two common conditions, acne and rosacea. However, accurate identification is essential in order to adopt appropriate treatment.
Acne and rosacea: distinct conditions
Location of lesions
Acne mainly affects the face, but can also appear on the back, chest, and shoulders. Rosacea, on the other hand, mainly affects the central part of the face, particularly the cheeks, nose, forehead, and chin.
Presence of comedones
Comedones, or blackheads, are characteristic of acne. They result from pores becoming blocked by excess sebum and dead skin cells. Rosacea, on the other hand, does not present comedones, but rather diffuse redness and dilated blood vessels visible to the naked eye.
Related symptoms
Rosacea may be accompanied by hot flashes, burning sensations, tingling, and, in some cases, eye problems such as dryness, irritation, or redness. These symptoms are not associated with acne.
Pathophysiological mechanisms
Acne
Acne is an inflammatory condition of the pilosebaceous follicles, characterized by excessive sebum production, hyperkeratinization of epidermal cells, and proliferation of bacteria. Cutibacterium acnes. These factors lead to clogged pores and inflammation.
Rosacea
Rosacea is a chronic inflammatory skin condition, the exact cause of which remains unknown. It is associated with vascular hyperreactivity, skin immune imbalance, and increased proliferation of mites. Demodex folliculorum.
Aesthetic consequences
Acne can leave atrophic (sunken) or hypertrophic (raised) scars, as well as post-inflammatory pigmentation spots, particularly in darker skin types. Rosacea, on the other hand, rarely causes permanent scarring, except in its severe form known as rhinophyma, characterized by a thickening of the nose.
Specific treatments
Azelaic acid
Azelaic acid is used in the topical treatment of acne and rosacea. It has antibacterial, anti-inflammatory, and keratolytic properties. Studies have demonstrated its effectiveness at concentrations of 15 to 20% in reducing inflammatory lesions and redness associated with rosacea.
Other treatments
- Acne : Treatments include topical retinoids, oral or topical antibiotics, and benzoyl peroxide (antibacterial) and isotretinoin for severe forms.
- Rosacea : treatment options include metronidazole topical, ivermectin, doxycyclineLow-dose oral medication and, in some cases, laser treatments for dilated blood vessels.
Medical diagnosis and consultation
Although acne and rosacea share some symptoms, their differences in terms of location, specific lesions, and underlying mechanisms require a distinct approach.
The diagnosis of rosacea is primarily clinical, based on physical examination and patient questioning. In case of doubt, a dermatological consultation is recommended to establish an accurate diagnosis and propose appropriate treatment.
