Cosmetology and Beauty Therapy

A crust is a collection of dried blood, serum, or pus that forms over a wound or lesion as it heals. It is a secondary lesion.

During high-frequency treatment, if heat is allowed to transfer from the lower follicle to the surface, it can cause excessive tissue damage, leading to blanching and potential pitted scarring.

Pili-multigemini is the clinical term for the condition where multiple hair shafts emerge from a single follicle opening. The other terms are variations or incorrect descriptors.

Hair growth is primarily driven by hormonal signals and the availability of nutrients and oxygen delivered via the blood supply to the hair bulb. While diet affects overall health, blood supply is the direct physiological mechanism.

Blanching (a temporary whitening of the skin) during electrolysis can be caused by excessive intensity, improper insertion depth, or over-treating an area. Therefore, all listed factors are valid contributors.

A lesion is a general term for any structural change in the tissues of the skin caused by injury or disease. Scars, calluses, and freckles are specific types of lesions.

A macule is a flat, discolored spot on the skin, such as a freckle. Pustules, skin tags, and keratomas are raised lesions.

Follicle shape determines hair texture. A round follicle produces straight hair, an oval follicle produces wavy hair, and a flat/elliptical follicle produces curly hair.

After electrolysis, an antiseptic is applied to the skin to prevent infection. Disinfectants are for surfaces, and anesthetics are for numbing before treatment.

Dermatitis is the general technical term for inflammation of the skin. Verruca is a wart, seborrhea is related to oil glands, and rosacea is a specific chronic condition.

Folliculitis is the inflammation or infection of the hair follicles. Furuncle is a boil, seborrhea is oiliness, and impetigo is a bacterial skin infection.

For fine, vellus hairs, a smaller probe size is required to ensure precision and minimize damage to the surrounding skin. A .002 probe is the smallest and most appropriate choice among the options.

A lentigine (or lentigo) is the technical term for a freckle or small pigmented spot on the skin. A naevus is a mole, and leukoderma refers to white patches.

Chloasma is a condition characterized by hyperpigmentation or discoloration of the skin, often associated with hormonal changes. Eczema and scleroderma are different skin conditions.

The pilosebaceous unit consists of the hair follicle, the sebaceous gland, and the arrector pili muscle. It is the fundamental structure responsible for hair growth and oil secretion.