CIDESCO Beauty Therapy Diploma (Ireland) key terms

Any condition, medication, or circumstance that makes a treatment unsafe or inadvisable for a client. The therapist must identify it during consultation and either adapt, postpone, or refuse the service and refer the client onward.

The structured pre-treatment conversation and record in which the therapist gathers medical history, lifestyle, skin and lifestyle information, confirms expectations, and agrees the treatment plan with informed consent.

A client's voluntary agreement to a treatment after being told, in understandable terms, what it involves, its expected benefits, its risks, and the alternatives. It must be documented before the service begins.

The confidential written or digital file holding consultation details, consent, treatment records, products used, reactions, and aftercare advice. It supports continuity of care and is retained according to data protection rules.

A small controlled application of a product, usually on the inner forearm or behind the ear, checked after 24 to 48 hours to detect sensitivity before a full treatment, especially with tints, adhesives, or active ingredients.

The process by which repeated exposure to an allergen teaches the immune system to react, so a product once tolerated can later cause itching, redness, or swelling. It is why allergy history is checked at every visit.

Any substance capable of triggering an immune reaction in a sensitised person. In beauty therapy common examples include fragrance components, nickel, paraphenylenediamine in hair colour, and some preservatives and essential oils.

The transfer of microorganisms from one person or object to another, directly or via hands, tools, linen, or surfaces. Standard precautions, hand hygiene, and tool disinfection are the core defences in every salon.

Routine infection-control measures applied to every client regardless of known status: hand hygiene, gloves where indicated, clean linen per client, safe sharps handling, and correct waste segregation.

The use of a chemical agent to reduce microorganisms on tools and surfaces to a safe level. It differs from sterilisation, which destroys all microorganisms including spores, and from simple cleaning, which only removes soil.

A tool or consumable intended for one client only, such as disposable spatulas, nail files, or wax strips. It must be discarded after use and never reprocessed, because cleaning cannot guarantee safety.

The outermost, avascular layer of skin, built mainly of keratinocytes. Its basal layer renews cells that migrate outward and eventually shed, and its barrier function limits water loss and entry of irritants.

The layer beneath the epidermis containing collagen and elastin fibres, blood vessels, nerves, glands, and hair follicles. It gives skin strength and elasticity and supplies the epidermis with nutrients.

The outermost part of the epidermis, made of flattened dead keratinocytes embedded in lipids. It is the main physical barrier and the target of exfoliation and many moisturising treatments.

The combined protective function of the stratum corneum and skin lipids that keeps water in and irritants, allergens, and microbes out. Damage shows as tightness, redness, flaking, and increased sensitivity.

The passive movement of water vapour out through the skin. Raised values indicate a compromised barrier, and therapists use the concept to explain why over-cleansing or aggressive exfoliation worsens dryness and sensitivity.

The main structural protein of the dermis, forming fibres that give skin tensile strength. Production declines with age and sun exposure, contributing to laxity and fine lines.

A resilient dermal protein that allows skin to stretch and recoil. Loss and fragmentation of elastin, largely from ultraviolet exposure, contribute to sagging and deep wrinkles.

Premature skin ageing caused by ultraviolet radiation, producing pigmentation, coarse wrinkles, roughness, and loss of elasticity. It is largely preventable through sun protection and is distinct from chronological ageing.

A classification of how skin tends to respond to ultraviolet light, based on colouring and burning versus tanning history. It guides safe treatment intensity and sun-protection advice.

A number indicating how much longer skin takes to burn with a sunscreen than without it, mainly reflecting UVB protection. It does not express UVA protection, so broad-spectrum products are needed.

Describes an ingredient or product likely to block pores and contribute to comedones or acne. Clients prone to congestion are advised to choose products labelled non-comedogenic.

A blocked hair follicle, either open (blackhead) where oxidised sebum darkens the surface, or closed (whitehead) where the follicle stays covered. Extraction is only appropriate when the skin allows it.

An oily secretion of the sebaceous glands that lubricates skin and hair. Excess sebum, combined with dead cells, contributes to congestion and provides a food source for acne-related bacteria.

A product that improves skin hydration and softness by adding humectants, reducing water loss with occlusives, or restoring lipids. Choice depends on skin type and on whether the barrier is intact.

Removal of dead cells from the skin surface, by mechanical means such as scrubs and brushes or chemical means such as hydroxy acids and enzymes. Overuse damages the barrier and causes irritation.

A smooth, gliding massage movement performed with relaxed hands in the direction of lymph and venous flow. It opens and closes a massage sequence and is used to apply product and soothe tissue.

A group of deeper massage movements that knead, lift, and squeeze soft tissue to release tension and improve circulation. It is applied after effleurage and before percussion in a classic sequence.

Brisk, rhythmic percussion movements such as hacking, cupping, and tapping, used briefly to stimulate circulation and tone. It is avoided over bony areas, inflamed skin, and on clients who find it uncomfortable.

A gentle, rhythmic technique using light skin stretching to encourage lymph movement toward lymph nodes. It is used for puffiness and post-surgical oedema only where training and medical clearance allow.

Swelling caused by fluid accumulating in tissues. In a spa or salon setting it is a caution flag, especially when one-sided, painful, or sudden, and requires referral rather than massage.

The therapeutic use of essential oils, usually diluted in a carrier oil and applied by massage or inhaled. Safe practice requires dilution, allergy awareness, and caution in pregnancy and with some medications.

A concentrated aromatic extract obtained from plant material, containing volatile compounds. It is never applied neat to skin, and some are phototoxic or contraindicated in pregnancy or epilepsy.

A base oil of plant origin, such as sweet almond or grapeseed, used to dilute essential oils and to lubricate the skin during massage. It also affects glide, absorption, and client comfort.

A reaction in which a substance on the skin becomes activated by ultraviolet light, causing redness, blistering, or pigmentation. Several citrus and bergamot oils are affected, so treated skin must avoid sun exposure.

Treating the client as a whole person, considering physical, emotional, and lifestyle factors rather than only the presenting concern. It shapes consultation questions, treatment planning, and aftercare advice.

An active, ongoing pursuit of health and balance across body, mind, and environment. In a spa context it frames services as supporting relaxation, sleep, movement, and self-care habits rather than only appearance.

The body's physiological reaction to pressure, involving raised heart rate, muscle tension, and hormone release. Understanding it explains why relaxation treatments may be recommended and why some clients need referral.

The use of water in various temperatures and forms, such as baths, jets, compresses, and steam, to relax muscles, stimulate circulation, and support cleansing. Safe practice includes temperature checks and hydration advice.

A sudden, stressful change in body temperature from moving quickly between hot and cold environments. It is a risk for clients with heart conditions or low blood pressure, so gradual transitions and rest are advised.

A treatment in which the body is coated with a product, then wrapped to encourage absorption, hydration, or a temporary firming effect. Claims must stay realistic and contraindications must be checked first.

An exfoliating treatment using abrasive particles or acids to remove dead surface cells before a wrap, massage, or self-tan. Pressure is adjusted to skin condition, and freshly scrubbed skin needs moisturising and sun care.

A cosmetic product, usually containing dihydroxyacetone, that darkens the stratum corneum temporarily through a colour reaction with amino acids. Results fade as cells shed, and it offers no sun protection.

A heated, humid room used to relax muscles and encourage sweating and softer skin. Time should be limited, and clients with heart conditions, low blood pressure, or pregnancy require caution or avoidance.

The visible hard keratin structure covering the nail bed, produced by the matrix and protected at its free edge. Its condition can signal trauma, infection, or nutritional and systemic issues worth referring.

The thin layer of skin sealing the base of the nail plate. It protects against infection and should be softened and gently pushed, never cut away aggressively, during a manicure.

Separation of the nail plate from the nail bed, often caused by trauma, aggressive filing, or skin disease. It is a contraindication to nail coatings and should be assessed and referred.

The repeating phases of anagen (growth), catagen (transition), and telogen (rest and shedding). Hair removal is most effective in anagen, which explains why courses of treatment are needed.

The active growth stage of a hair follicle, when the hair is connected to its blood supply and pigment. It is the phase targeted by light-based hair reduction and where waxing gives the best result.

A device emitting broad-spectrum light pulses that target pigment or blood vessels and can reduce hair growth. It requires trained operators, patch testing, and strict attention to skin type and eye protection.

A modality that applies controlled electrical impulses to cause muscle contraction, used in body treatments for temporary toning or in facial work for muscle re-education. It has clear electrical and medical contraindications.