Glossary A

Rosacea Terms and Definitionsw


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To manage and control your rosacea effectively, it is important to understand the terminology associated with rosacea. Most dermatologist have stated for years that they are baffled by rosacea. And if dermatologist can not understand the cause, then how can they effectively treat rosacea? Our team of Rosacea Researchers with 40 years of collective research, led by a Johns Hopkins MD, have confirmed that the cause or etiology of rosacea is an immune system disorder which you may desire to learn more about on the Cause or Etiology page .


Acanthamoeba keratitis – pus-producing form of keratitis associated with an infection due to the use soft or rigid contact lenses.

Accutane® – a brand of Isotretinoin. Isotretinoin is a poor rosacea alternative to oral antibiotics which are bad enough already. This medication is sometimes an effective treatment for severe outbreaks pustules.

Achromycin V® – an oral antibiotic medication often prescribed for the treatment of rosacea. Also sold under the brand name Tetracycline.

Aclometasone dipropionate – Anti-infective, topical, cream corticosteroid medications used for treatment of arthritis and atopic dermatitis. Also sold under the brand name: Aclovate.

Aclovate® – by Glaxo Wellcome, (Aclometasone dipropionate) Anti-infective, topical, cream corticosteroids for treatment of arthritis and atopic dermatitis.

Acne – An inflammatory skin condition characterized by superficial skin eruptions around hair follicles.

Acne-Ltd IV™ – will effectively improve the appearance of rosacea, acne rosacea, or adult acne.

Acne Rosacea – chronic inflammation and congestion of the oil glands and of the skin; cheeks and nose appear red and flushed. Acne Rosacea looks like bad acne; the cheeks and sometimes the nose have a flushed, red appearance. Acne Rosacea is more common among fair-skinned people.

Acne Vulgaris – An inflammatory acne skin condition characterized by superficial skin eruptions around hair follicles.

Acrodermatitis Continua of Hallopeau – also known as Acropustulosis, pustular psoriasis occurring as skin lesions on the tips of the fingers and toes.

Acropustulosis – a less common form of pustular psoriasis is characterized by skin lesions on the ends of the fingers and sometimes the toes.

Actinic dermatitis – due to exposure to actinic radiation, such as that from the sun, ultraviolet waves, or x- or gamma radiation.

Acute – sudden or severe. An acute skin condition is one in which symptoms appear, change, or worsen rapidly. The opposite of chronic.

Adapalene – is a topical retinoid acne medication indicated for the treatment of acne vulgaris or adult acne. Also sold under the brand name: Differin®.

Afirm™ – brand name for a retinol product used in the treatment of adult acne or acne vulgaris.

AHA – abbreviation for alpha hydroxyl acid, a simple organic fruit acid found in nature or synthesized in the laboratory. It is sometimes used in the treatment of adult acne or acne vulgaris.

Allergen – a substance that can produce a hypersensitive reaction in the body.

Allergic contact dermatitis – the itchy, red, blistered reaction that almost everyone experiences after touching a plant in the “rhus” family—poison ivy, poison oak or poison sumac.

Allergic Phytodermatitis – another term for allergic contact dermatitis.

Allergic rhinitis – a seasonal allergic, upper respiratory reaction stimulated by tree, grass or weed pollen that causes sneezing and watery, itchy eyes. Hay fever is a specific type of allergic rhinitis.

Alpha Hydroxy Acid – or AHA is a simple organic fruit acid found in nature or synthesized in the laboratory, sometimes used in the treatment of adult acne or acne vulgaris.

Angioedema – a swelling of the deeper layers of the skin sometimes occurs with hives. Angioedema is not red or itchy, and most often occurs in soft tissue such as the eyelids, mouth or genitals

Annular pustular psoriasis – psoriasis occurring in a ring-like appearance where the outer margin is red with lighter or normal looking skin inside the circle.

Anthralin – a topical agent prescribed for the treatment of psoriasis.

Antibiotics – A range of drugs or medications which are used in the treatment of conditions involving bacteria.

Antibody – an immunoglobulin that binds specifically to a given antigen.

Antigen – a substance that reacts with antibodies or memory T cells to give rise to an immune reaction. An antigen that binds with a specific antibody or T cell can give rise to allergy.

Antihistamine – a substance capable of reducing inflammation, swelling and other effects often experienced as an allergic reaction .

Anti-pruritic – anti-itch.

Anusol-HC® – Hydrocortisone – a natural chemical made by the body which reduces swelling, itching, inflammation and burning. The most common prescribed and/or over the counter steroid. Very low potency steroid. Also sold under the brand name(s): Cetacort®, Nutracort®, Hytone®, Cort-Dome®, Cortenema®, Cortifoam®, Cortaind®, Lanacort®, Locoid®, Westcort®.

Artefacta – a skin condition marked by lesions that are self-inflicted by the patient, whether by chemical or physical means.

Arthritis –  inflammation of joints due to infectious, metabolic, or constitutional causes.

Arthritis mutilans a rare form of psoriatic arthritis which occurs less than 5% of the time. This sub-type is a more severe, deforming and destructive form of arthritis.

Aquanil® HC – Lotion (Person & Covey), 1% hydrocortisone for anti-pruritic (anti-itch) treatment of sensitive skin. It is indicated for the temporary relief of minor skin irritation, inflammation, itching and rashes.

Asteatotic Dermatitis – or eczema craquelé is characterized by pruritic, dry, cracked, and polygonally fissured skin with irregular scaling. It most commonly occurs on the shins of elderly patients, but it may occur on the hands and the trunk.

Asthma – a respiratory disorder characterized by breathing trouble (wheezing).

Asymmertric Psoriatic Arthritis a more mild version of psoriatic arthritis which affects about 70% of patients with psoriatic arthritis . It does not occur in the same joints on both sides of the body and will usually involve fewer than 3 joints.

Athlete’s foot – Athlete’s foot appears as an itching, burning skin rash on the feet or hands. Blisters often form, and the skin is red and inflamed.

Atopic – an hereditary tendency to experience immediate allergic reactions because of the presence of an antibody in the skin.

Atopic dermatitis – Atopic dermatitis is a chronic skin condition categorized by itching, rash, and a personal or family history of seasonal allergies or asthma. Alternative names: Infantile eczema; Atopic eczema; Dermatitis – atopic; Eczema.

Atopic pleat – (Dennie-Morgan fold): an extra fold of skin that develops under the eye. Commonly occurs in atopic dermatitis.

Azelaic Acid – (heptanedicarboxylic acid) is used for the treatment of mild to moderate acne. Sold under the brand name, Finevin. Also called Azelex Acid.