Rosacea

Rosacea is a chronic inflammatory skin disease that may be triggered by a number of factors (e.g., alcohol, stress). The etiology is unclear; however, the disease is more common in female, middle-aged, and light-skinned individuals. The disease presents with central facial erythema, telangiectasias, and papules/pustules. In severe cases, the nose develops a large, bulbous shape (rhinophyma). In contrast to acne, comedones are not present. Treatment options include the avoidance of triggers, topical agents (e.g., metronidazole, brimonidine) for mild disease and oral agents (e.g., metronidazole) for more severe disease.

• Sex: ♀ > ♂ ^[1]
• Age range: 30–60 years ^[1][2]

Epidemiological data refers to the US, unless otherwise specified.

The cause of rosacea is not entirely understood. It involves chronic inflammation of skin and is especially associated with triggers that increase body temperature.

• Trigger factors
  • Hot weather, hot drinks, spicy food
  • Stress, alcohol, nicotine
  • Demodex mites

References:^[1][3]

• Erythematotelangiectatic rosacea
  • Facial flushing
  • Persistent erythema of the face (together with telangiectasias)
• Papulopustular rosacea
  • Papules, pustules, and erythema
  • Comedones are not present in patients with rosacea.
• Phymatous rosacea
  • Skin and sebaceous glands thicken
  • Inflammatory, widespread nodules
  • Rhinophyma: enlarged, bulbous nose (almost exclusively in males)
  • Similar changes may occur on the chin, forehead, cheeks, and ears
• Ocular rosacea
  • Conjunctival hyperemia (most common)
  • Blepharitis (inflammation of the eyelid margin), stye (hordeolum externum), chalazion
  • Dry eyes and foreign-body sensation
  • Keratitis

In contrast to acne, comedones are NOT present in patients with rosacea.

References:^[4][5]

• Demodicosis
  • Rare disease with lesions similar to rosacea
  • Erythema, papules, and pustules appearing unilaterally on a cheek and an eyelid
  • Infection of the sebaceous glands by Demodex mites (Demodex folliculorum and Demodex brevis)

The differential diagnoses listed here are not exhaustive.

• Lifestyle modifications: avoid trigger factors (see "Etiology" above)
• Medical therapy
  • For erythema, flushing, skin sensitivity, xerosis:
    • Topical brimonidine
    • Topical oxymetazoline
  • For papules and pustules:
    • Topical agents for mild disease
      • Metronidazole (also for ocular rosacea)
      • Azelaic acid
      • Ivermectin
      • Sodium sulfacetamide
    • Oral agents for moderate to severe disease and refractory disease
      • Tetracyclines: e.g., doxycycline (also for ocular rosacea), tetracycline, minocycline
      • Isotretinoin (first-line for phymatous rosacea)
• Laser therapy: for erythema, telangiectasias, and phymatous rosacea
• Surgical therapy: for phymatous rosacea; includes electrocautery and dermabrasion

References:^[4][6][7][8]

• Granulomatous lesions
  • Small brown papules, especially around the mouth and eyes
  • Granulomatous lesions may occur on their own, without other symptoms of rosacea
  • Histology: tuberculoid granulomas

All patients with rosacea and concurrent eye problems should have their eyes examined by an ophthalmologist.

We list the most important complications. The selection is not exhaustive.