Glossary of Common Rosacea Medical Terms
- Blepharitis: Inflammation of the eyelids.
- Chalazion: A cyst on the eyelid due to plugging of the meibomian glands, fat-secreting glands of the eyes.
- Comedone: A plugged hair follicle. May be open (blackhead) or nearly closed (whitehead).
- Comorbidity: The occurrence of two disorders or illnesses in the same person, at the same time or one after another. Comorbidity does not necessarily mean that one causes the other.
- Controlled study: An experiment or clinical trial that includes an untested comparison group, referred to as a "control group."
- Cutaneous: Pertaining to the skin.
- Double-blind: A research procedure in which neither the patient nor the investigator knows who is receiving the experimental substance or procedure and who is receiving a placebo. Done to avoid bias in the study.
- Edema: Swelling from abnormally large amounts of fluids in the tissues.
- Erythema: Abnormal redness of the skin.
- Erythematotelangiectatic rosacea: Subtype 1 rosacea, characterized by flushing and persistent redness. Visible blood vessels may also appear.
- Flushing: Transient redness of the face and neck.
- Granuloma: A tumor-like mass or nodule of tissue.
- Granulomatous rosacea: Variant of rosacea, characterized by hard yellow, brown or red papules or nodules.
- Nasolabial folds: The “laugh lines” that run from the nose to the corner of the mouth.
- Nodule: A small node that is solid and can be detected by touch.
- Ocular rosacea: Subtype 4 rosacea, characterized by watery or bloodshot appearance, irritation, burning or stinging of the eyes.
- Papule: A small, dome-shaped, solid, usually inflamed elevation of the skin.
- Papulopustular rosacea: Subtype 2 rosacea, characterized by facial redness with bumps or pimples.
- Paranasal: Alongside the nose.
- Phymatous rosacea: Subtype 3 rosacea, characterized by thickening or growth of excess tissue, often around the nose.
- Placebo: An oral or topical formulation without this active ingredient, used for comparison with the active medication in controlled clinical studies.
- Plaque: Elevated red patch on the skin.
- Pustule: A small elevation of the skin filled with a white substance.
- Recalcitrant: Not responsive to treatment.
- Rhinophyma: Enlargement of the nose with excess tissue, a common form of phymatous rosacea.
- Subtype: A common pattern or grouping of signs and symptoms.
- Subtype 1 rosacea: Erythematotelangiectatic rosacea, characterized by flushing and persistent redness. Visible blood vessels may also appear.
- Subtype 2 rosacea: Papulopustular rosacea, characterized by facial redness with bumps or pimples.
- Subtype 3 rosacea: Phymatous rosacea, characterized by thickening or growth of excess tissue, often around the nose.
- Subtype 4 rosacea: Ocular rosacea, characterized by watery or bloodshot appearance, irritation, burning or stinging of the eyes.
- Telangiectasia: Blood vessels visible through the skin.
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The National Rosacea Society is a 501(c)(3) nonprofit organization whose mission is to improve the lives of people with rosacea by raising awareness, providing public health information and supporting medical research on this widespread but little-known disorder. The information the Society provides should not be considered medical advice, nor is it intended to replace
consultation with a qualified physician. The Society does not evaluate, endorse or recommend any particular medications, products, equipment or treatments. Rosacea may vary substantially from one patient to another, and treatment must be tailored by a physician for each individual case. For more information, visit About Us.