The consensus committee and review panel of 17 medical experts worldwide identified four subtypes of rosacea, defined as common patterns or groupings of signs and symptoms. These include:
- Subtype 1 (erythematotelangiectatic rosacea), characterized by flushing and persistent redness, and may also include visible blood vessels.
- Subtype 2 (papulopustular rosacea), characterized by persistent redness with transient bumps and pimples.
- Subtype 3 (phymatous rosacea), characterized by skin thickening, often resulting in an enlargement of the nose from excess tissue.
- Subtype 4 (ocular rosacea), characterized by ocular manifestations such as dry eye, tearing and burning, swollen eyelids, recurrent styes and potential vision loss from corneal damage.
Many patients experience characteristics of more than one subtype at the same time, and those often may develop in succession. While rosacea may or may not evolve from one subtype to another, each individual sign or symptom may progress from mild to moderate to severe. Early diagnosis and treatment are therefore recommended.