Rash Glossary of Terms

The following are health and medical definitions of terms that appear in the Rash article.

Acne: Localized skin inflammation as a result of overactivity of the oil glands at the ba...

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Acyclovir: (Brand name: Zovirax) One of a group of antiviral drugs that acts against the...

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Allergy: A misguided reaction to foreign substances by the immune system, the body system ...

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Amyloidosis: A group of diseases that result from the abnormal deposition of a protein, ca...

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Antibiotic: A drug used to treat infections caused by bacteria and other microorganisms. ...

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Antibody: An immunoglobulin, a specialized immune protein, produced because of the introdu...

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Antifungal: A medication that limits or prevents the growth of yeasts and other fungal org...

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Antihistamines: Drugs that combat the histamine released during an allergic reaction by bl...

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Antinuclear antibody: An unusual antibody that is directed against structures within the n...

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Antiviral: An agent that kills a virus or that suppresses its ability to replicate and, he...

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Aspergillosis: Infection with the fungus Aspergillus, seen especially in people with compr...

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Atopic: A predisposition toward developing certain allergic hypersensitivity reactions. At...

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Atopic dermatitis: A skin disease characterized by areas of severe itching, redness, scali...

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Atypical: Unusual, or not fitting a single diagnostic
category.

Autoimmune: Pertaining to autoimmunity, a misdirected immune response that occurs when the...

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Bacteria: Single-celled microorganisms that can exist either as independent (free-living) ...

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Bacterial: Of or pertaining to bacteria, as in a bacterial lung infection.

Biopsy: The removal of a sample of tissue for examination under a microscope to check for ...

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Blood count: The calculated number of white or red blood cells (WBCs or RBCs) in a cubic m...

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Bumps: The raised area of a bump or bruise results from blood leaking from these injured b...

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Cancer: An abnormal growth of cells which tend to proliferate in an uncontrolled way and, ...

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CBC: A commonly used abbreviation in medicine that stands for complete blood count, a set...

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Cellulitis: A spreading bacterial infection underneath the skin surface characterized by r...

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Chemotherapy: 1. In the original sense, a chemical that binds to and specifically k...

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Chickenpox: A highly infectious viral disease also known medically as varicella -- in many...

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Chills: feelings of coldness accompanied by shivering. Chills may develop after exposure t...

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Chronic: In medicine, lasting a long time. A chronic condition is one that lasts 3 months ...

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Complete blood count: A set values of the cellular (formed elements) of blood. These meas...

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Contact dermatitis: A skin condition caused by contact between skin and some substance. In...

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Cortisone: A naturally occurring adrenocorticoid hormone that is produced in minute amount...

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Coxsackievirus: A family of enteroviruses first found in the town Coxsackie, south of Alba...

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Cryptococcosis: Infection with fungus (usually in a yeast form) from the genus Crypto...

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Curable: Amenable to a cure, capable of being cured, to being healed and made well. From ...

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Dermatitis: Inflammation of the skin, either due to direct contact with an irritating sub...

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Dermatologist: A physician who specializes in the diagnosis and treatment of skin problems...

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Diagnosis: 1 The nature of a disease; the identification of an illness. 2 A ...

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Doxycycline: Brand name: Vibramycin. A synthetic broad-spectrum antibiotic derived from te...

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Dry skin: Abnormally dry skin. Can be caused by a dry climate, winter weather, deficiency...

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EBV: Epstein-Barr virus.

Eczema: A particular type of inflammatory reaction of the skin in which there are typicall...

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Epstein-Barr virus: A virus in the herpes family that is best known as the cause of infect...

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Erythromycin: Erythromycin is a common antibiotic for treating bacterial infection. Sold...

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Fasciitis: Inflammation of the fascia.

Fetus: An unborn offspring, from the embryo stage (the end of the eighth week after concep...

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Fever: Although a fever technically is any body temperature above the normal of 98.6 degr...

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Folliculitis: An infection or inflammation of the hair follicles of the skin. Inflammation...

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Fungal: Pertaining to a fungus. For example, a fungal skin infection.

Fungi: Plural of fungus.

Fungus: A single-celled or multicellular organism. Fungi can be true pathogens (such as hi...

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Gram stain: The Danish bacteriologist J.M.C. Gram (1853-1938) devised a method of staining...

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Groin: The area where the thigh meets the hip.

Guttate psoriasis: A type of psoriasis characterized by red, scaly plaques of inflamed ski...

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Headache: A pain in the head with the pain being above the eyes or the ears, behind the he...

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Herpes: A family of viruses. Herpes also refers to infection with one of the human herpesv...

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Herpes zoster: Also called shingles, zona, and zoster. The culprit is the varicella-zoster...

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Histoplasmosis: A disease caused by the fungus Histoplasma capsulatum. Most people with hi...

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HIV: Acronym for the Human Immunodeficiency Virus, the cause of AIDS (acquired immunodefi...

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Hives: A raised, itchy area of skin that may be a sign of an allergic reaction. It can be ...

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Hygiene: The science of preventive medicine and the preservation of health. Also commonly ...

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Immune: Protected against infection, usually by the presence of antibodies.

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Immune system: A complex system that is responsible for distinguishing a person from every...

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Impetigo: A skin infection caused by the staphylococcus or, less often, by the streptococc...

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Infection: The invasion and multiplication of microorganisms such as bacteria, viruses, an...

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Inflammation: A localized reaction that produces redness, warmth, swelling, and pain as a ...

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Injury: Harm or hurt. To harm, hurt, or wound. The word injure may be in physical or emot...

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Itching: An uncomfortable sensation in the skin that feels as if something is crawling on ...

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Laboratory: A place for doing tests and research procedures, and for preparing chemicals a...

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Lesion: An area of abnormal tissue change. Lesions vary in severity from harmless to serio...

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Lips: Aside from the lips of the mouth, there are two pairs of lips at the entrance to the...

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Liver: The largest solid organ in the body, situated in the upper part of the abdomen on t...

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Lupus: A chronic inflammatory disease that is caused by autoimmunity. Patients with lupus ...

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Macular: Pertaining to the macula. A macula is a small spot. A macula on the skin is a s...

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Microscope: An optical instrument that augments the power of the eye to see small objects....

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Microscopic: So small it cannot be seen without the aid of microscope. As opposed to macro...

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Microscopy: The examination of minute objects by means of a microscope, an instrument whic...

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Mite: A tiny eight-legged creature belonging to the Order Acarina related to spiders and t...

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Mononucleosis: Infection with the Epstein-Barr virus (EBV, human herpesvirus 4, HHV-4) in...

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Mouth: 1. The upper opening of the digestive tract, beginning with the lips and con...

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MRSA infection: Frequently used abbreviation for: Methicillin-resistant staphylococcus aur...

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Nail: In medicine, there are two types of nails. One is just a plain old metal nail used t...

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Nasal: Having to do with the nose.

Neck: The part of the body joining the head to the shoulders. Also, any narrow or constric...

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Necrotizing fasciitis: Severe bacterial infection of the fascia, the tissues that line and...

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Nickel: A silver-white metallic element. Long-term exposure to nickel, such as from jewelr...

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Nose: The external midline projection from the face. The purpose of the nose is to warm, c...

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Ointment: An oil-based preparation that is applied to the skin. Whereas an ointment has an...

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Onset: In medicine, the first appearance of the signs or symptoms of an illness as, for ex...

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Pain: An unpleasant sensation that can range from mild, localized discomfort to agony. Pa...

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Papular: Referring to papules.

Parasitic: Having to do with a parasite, as in a parasitic infection; or acting like a par...

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Penicillin: The most famous of all antibiotics, named for the fungal mold Penicillium n...

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Poison: Any substance that can cause severe organ damage or death if ingested, breathed in...

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Poison ivy: Skin inflammation that results from contact with the poison ivy vine. Chemical...

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Poison oak: Skin inflammation that results from contact with the poison oak plant. Chemica...

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Potassium: The major positive ion (cation) found inside cells. The chemical notation for p...

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Pregnancy: The state of carrying a developing embryo or fetus within the female body. Thi...

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Psoriasis: A reddish, scaly rash often located over the surfaces of the elbows, knees, sca...

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Pus: A thick, whitish-yellow fluid that results from the accumulation of white blood cells...

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Rash: Breaking out (eruption) of the skin. A rash can be caused by an underlying medical c...

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Recurrent: Appearing or occurring again. For example, a recurrent fever is a fever that ha...

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Refractory: Not yielding, or not yielding readily, to treatment.

Respiratory: Having to do with respiration.

Rosacea: A chronic skin disease that causes persistent redness over the areas of the face ...

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Rule out: Term used in medicine, meaning to eliminate or exclude something from considera...

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Saliva: a watery secretion in the mouth produced by the salivary glands that aids in the d...

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Sarcoidosis: A disease of unknown origin that causes small lumps (granulomas) due to chron...

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Scabies: Infestation of the skin by the human itch mite, Sarcaptes scabies. The initial ...

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Scalded skin syndrome: A potentially serious side effect of infection with the Staph (Stap...

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Scaling: Abnormal shedding or accumulation of an upper layer of skin (the stratum corneum)...

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Scarlet fever: A skin condition that is due to a streptococcal sore throat or any other st...

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Scleroderma: A disease of connective tissue that causes scar tissue (fibrosis) to form in ...

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Seborrhea: A chronic inflammatory disease of the skin characterized by the accumulation of...

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Seborrheic dermatitis: A medical name for what is popularly called seborrhea.

Sensitivity: 1. In psychology, the quality of being sensitive. As, for example, sen...

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Shingles: An acute infection caused by the herpes zoster virus, the same virus as causes ...

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Skin biopsy: Removal of a piece of skin for the purpose of diagnostic examination. Skin bi...

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Staphylococcal scalded skin syndrome: An infection of the skin with group II Staphylococc...

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Staphylococcus: A group of bacteria that cause a multitude of diseases. Under a microscope...

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Steroid: One of a large group of chemical substances classified by a specific carbon struc...

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Strep: Very commonly used shortened form of Streptococcus, a very common and import...

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Strep throat: Strep throat is an infection caused by a type of bacteria called streptococc...

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Streptococcus: A group of bacteria that causes a multitude of diseases. Under a microscope...

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Superficial: In anatomy, on the surface or shallow. As opposed to deep. The skin is superf...

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Syndrome: A combination of symptoms and signs that together represent a disease process.

Systemic: Affecting the entire body. A systemic disease such as diabetes can affect the wh...

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Systemic lupus erythematosus: A chronic inflammatory condition caused by an autoimmune di...

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Therapy: The treatment of disease. Therapy is synonymous with treatment.

Throat: The throat is the anterior (front) portion of the neck beginning at the back of th...

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Thyroid: 1. The thyroid gland. Also, pertaining to the thyroid gland. 2. A p...

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Thyroiditis: Inflammation of the thyroid gland which is located in front of the neck:

...

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Topical: Pertaining to a particular surface area. For example, a topical agent is applied ...

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Tzanck smear: See Tzanck test.

Urticaria: Another name for the hives. Raised, itchy areas of skin that are usually a sign...

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Vaccination: Injection of a killed microbe in order to stimulate the immune system against...

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Vesicular: Referring to the presence of one or more vesicles. For example, a vesicular ras...

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Viral: Of or pertaining to a virus. For example, if a person has a viral rash, the rash wa...

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Viral infection: Infection caused by the presence of a virus in the body. Depending on...

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Virus: A microorganism that is smaller than a bacterium that cannot grow or reproduce apar...

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Viruses: Small living particles that can infect cells and change how the cells function. I...

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Xerosis: Abnormal dryness of the skin, mucous membranes, or conjunctiva (xerophthalmia). T...

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Yeast infection: Overgrowth of yeast can affect the skin (yeast rash), mouth (thrush), di...

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Medical Dictionary