Glossary: R

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This glossary defines commonly used dermatitis terms, including products and medications used in the treatment of dermatitis and other skin conditions that co-exist with dermatitis, such as acne, rosacea, eczema, and psoriasis.

Radiation dermatitis: radiodermatitis -Roentgen-ray dermatitis:

Rat-mite dermatitis: inflammation of the skin due to a bite of the rat-mite, Ornithonyssus bacoti.

Retinoids: vitamin A derivatives used in the prevention and treatment of various skin problems.

Retinol: (retinyl acetate, retinyl alcohol) is a naturally occurring form of vitamin A and is found in many fruits and vegetables with an orange, yellow, or red color.

Retin-A®: whose generic name is tretinoin, is a topical Vitamin A acid.

Retinoids: a synthetic derivative of Vitamin A, which are taken orally. These drugs have been very successful in treating severe cases of ichthyosis. The two most common retinoids are Accutane (isotretinoin) and Soriatane (acetretin).

Rheumatoid arthritis: chronic disease of unknown cause and characterized by pain, stiffness, inflammation, swelling and sometimes destruction of joints

Rhinophyma: (rye-no-feye-muh) - Nasal bumps. When rosacea is not treated, some people develop bumps on the nose. As more bumps appear, the nose looks swollen. Alternative names Bulbous nose; Nose – bulbous

Rhus dermatitis: allergic contact dermatitis caused by contact with plants such as poison ivy or poison oak.

Ringworm: Ring-shaped lesions or rashes appear on the skin. The lesions are itchy, and usually occur on exposed areas of the body, such as the inner arm.

Robimycin®: Oral antibiotic used to treat infections. Also sold under the brand name(s): Erthromycin®, Eryc®, E.E.S.®, E-Mycin®, Erythrocin® (Oral), Pediamycin®, Ilosone®

Rosacea: Pronounced rose-ay-shah. A chronic inflammation of the cheeks, nose, chin, forehead, or eyelids; it may cause redness, vascularity (increased prominence of the blood vessels), swelling or hyperplasia (increase in size of the tissue), or skin eruptions similar to acne. Alternative names Acne rosacea

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