Cosmetology and Beauty Therapy

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.

Hypertrichosis refers to an abnormal or excessive amount of hair growth over the body. Hirsutism is specifically androgen-dependent hair growth in women, while hypertrichosis is not necessarily hormonal.

Explaining hair growth cycles is a critical part of managing client expectations. The consultation is the appropriate time to educate the client on why multiple sessions are necessary.

When treating the upper lip, starting from the outer corners and working inward helps manage skin tension and visibility more effectively than starting in the center.

The two primary types of hair are terminal hair (thick, pigmented) and vellus hair (fine, light, 'peach fuzz').