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Glossary Allergy Testing

medical procedure identifying allergic reactions to specific substances

Allergy testing, also known as allergen testing, is a medical procedure used to determine if a person has an allergic reaction to specific substances. This can be done through skin tests, where small amounts of potential allergens are introduced to the skin, or blood tests, which measure the presence of specific antibodies. These tests help identify triggers for allergic reactions, aiding in the diagnosis and management of allergies.

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Research

5 / 1000+ results

research Pityrosporum species as a cause of allergy and infection

89 citations , May 1999 in “Allergy”

This article reviews the role of Pityrosporum (Malassezia) in skin conditions such as pityriasis versicolor, seborrheic dermatitis, and atopic dermatitis, and discusses treatment approaches; it reports no new clinical results.

Sensitization and Clinically Relevant Allergy to Hair Dyes and Clothes from Black Henna Tattoos: Do People Know the Risk? An Uncommon Serious Case and a Review of the Literature

research Sensitization and Clinically Relevant Allergy to Hair Dyes and Clothes from Black Henna Tattoos: Do People Know the Risk? An Uncommon Serious Case and a Review of the Literature

1 citations , July 2016 in “Cosmetics”

This review highlights a case of cross sensitization to dyes from temporary henna tattoos and stresses the need for public awareness on the risks associated with these tattoos.

research Patch tests with commercial hair dye products in patients with allergic contact dermatitis to para-phenylenediamine

6 citations , January 2016 in “Indian Journal of Dermatology Venereology and Leprology”

This study found that the majority of "hypoallergenic" hair dyes still triggered allergic reactions in patients sensitive to para-phenylenediamine.

research Adverse Reactions to Biologic Medications Used in Allergy and Immunology Diseases

2 citations , October 2022 in “Current Allergy and Asthma Reports”

This review outlines the various adverse reactions to biologic therapies in Allergy/Immunology, emphasizing the clinical and management challenges due to overlapping reaction phenotypes and the need for more refined diagnostic and management strategies.

research Patterns of Sensitization and Cross-Reactivity in Hair Dye Allergy: An 18-Year Tertiary-Center Experience from Greece.

February 2026 in “PubMed”

This study reported that para-phenylenediamine and toluene-2,5-diamine are the main sensitizers in hair dye-related allergic contact dermatitis, with significant cross-reactivity to several other compounds.

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Community Join

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community Dermatologist won't prescribe oral finasteride without first trying topical and having blood and sperm tests done

1 upvotes 7 months ago

A user is frustrated that their dermatologist requires blood and sperm tests before prescribing oral finasteride, despite already taking oral minoxidil. They prefer oral medication over topical treatments due to sensory issues and are considering asking their GP for a finasteride prescription or seeking alternatives online.

community 11mth daily 0.5mg oral finasteride

in Finasteride/Dutasteride 835 upvotes 1 year ago

The user experienced significant hair regrowth with 0.5mg oral finasteride daily, despite a minoxidil allergy, and reported no side effects. They also used a keto shampoo and were satisfied with the results.

community Tattooing Hair Loss Drugs into your Scalp

in Treatment 106 upvotes 1 year ago

Tattooing hair loss drugs like minoxidil and dutasteride into the scalp is discussed as an alternative to daily pills, with mixed opinions on its effectiveness and convenience. Some users report positive results, but concerns about cost, potential side effects, and the procedure's discomfort are noted.

community 22M Losing hair since 16, nothing helps, scalp always itchy. Just fed up.

in Treatment 59 upvotes 11 months ago

A 22-year-old experiencing hair loss and persistent scalp itchiness since age 16 has tried various treatments, including finasteride, ketoconazole shampoo, and dietary changes, with no success. Suggestions include consulting a knowledgeable dermatologist, considering seborrheic dermatitis, and trying different shampoos like Selsun Blue or those with selenium sulfide.

community Low level chronic allergies and hair loss

5 upvotes 2 years ago

Hair loss can be influenced by chronic low-level allergies, and treatments like fexofenadine or topical cetirizine may help with regrowth. The user avoids finasteride, dutasteride, and minoxidil, and has tried Regenera Activa and PRF sessions.

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Learn

3 / 801 results

learn sh-Polypeptide-7

Are there any safety concerns or allergic reactions associated with sh-Polypeptide-7 in topical hair products? There are no published human studies on sh-Polypeptide-7 itself, so its safety is unestablished; research on cosmetic peptides as a class reports low irritation and rare allergy, and dermatologists advise patch testing a new scalp product.

learn Neem Oil

natural substance from Neem tree with medicinal and pesticidal properties

learn Cetirizine

Can an allergy pill like cetirizine help calm your scalp and regrow hair? Cetirizine may calm scalp inflammation but is not proven to regrow hair.

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