Scalp and Hair Analysis Flashcards

What is alopecia areata?

Answer: An autoimmune condition causing sudden, round patches of hair loss

Alopecia areata is an autoimmune disorder where the immune system mistakenly attacks hair follicles, causing sudden, round or oval patches of hair loss. It can occur at any age and the patches may regrow spontaneously or progress.

What is androgenetic alopecia?

Answer: Pattern baldness caused by genetic and hormonal factors

Androgenetic alopecia is the most common form of hair loss, caused by genetics and the hormone dihydrotestosterone (DHT). In men, it typically presents as receding hairline and crown thinning. In women, it presents as overall thinning.

What is the purpose of a hair density analysis?

Answer: To assess the number of hairs per square area, helping determine product selection and technique adjustments

Hair density analysis determines how many individual hair strands grow per square centimetre of scalp. It helps stylists adjust chemical formulations, application techniques, product amounts, and cutting approaches for optimal results.

What is contact dermatitis in relation to salon services?

Answer: An inflammatory skin reaction caused by direct contact with an irritant or allergen such as a chemical product

Contact dermatitis is an inflammatory reaction of the skin triggered by direct contact with an irritating substance (irritant contact dermatitis) or an allergen (allergic contact dermatitis). Common salon triggers include colour chemicals, latex, and fragrances.

How can a stylist determine if hair has been previously treated with metallic dye?

Answer: By performing a metallic salt test using 1:20 peroxide and ammonia solution on a hair sample

A metallic salt test (1:20 test) involves immersing a strand of hair in a solution of hydrogen peroxide and ammonia. If metallic salts are present, the solution will change colour, bubble, heat up, or the hair may dissolve or change colour.

What is folliculitis?

Answer: Inflammation or infection of the hair follicles, often appearing as small red bumps or pustules

Folliculitis is an inflammation or infection of the hair follicles, usually caused by bacteria (often Staphylococcus aureus) or fungi. It presents as small, red, often pus-filled bumps around hair follicles and can be itchy or painful.