AP403 Skin Disorders and Diseases Relating to Aesthetic Practice Assignment Brief 2026

University	Qualifi Ltd
Subject	AP403 Skin Disorders and Diseases Relating to Aesthetic Practice (H/618/7049)

AP403 Assignment Brief

Qualification	Qualifi Level 4 Certificate in Anatomy and Physiology for Aesthetics Practice
Unit Reference Number	H/618/7049
Unit Code	AP403
Unit Title	Skin Disorders and Diseases Relating to Aesthetic Practice
Number of Credits	6
Total Qualification Time (TQT)	60 hours
Guided Learning Hours (GLH)	44 hours

Unit Aim

In this unit, learners will develop an understanding of the skin disorders and diseases relating to aesthetic practice. With the support and confidence of attaining knowledge of the science that underpins aesthetics, they will be better equipped to respond to newly implemented practices and adapt existing protocols. This unit is suitable for aestheticians currently practising or planning to train in aesthetic practice.

Learning Outcomes and Assessment Criteria

Learning Outcome To achieve this unit, a learner must:	Assessment Criteria (Knowledge) Assessment of this outcome will require a learner to demonstrate that they can:
LO1. Understand the common skin types, diseases, and disorders.	1.1 Describe the characteristics of the ‘Lancer’ skin types: normal/balanced, dry, oily, combination, sensitive and photo-aged/aging skin
	1.2 Explain the differences between redundant skin and hyperdynamic expression lines 1.3 Explain the role of melanocytes in the production of melanin. 1.4 Explain how mutations caused by UV light can lead to basal cell carcinoma and melanoma. 1.5 Evaluate the role of the Fitzpatrick scale as a quantitative measure of skin pigmentation 1.6 Analyse the causes of hypopigmentation, hyperpigmentation, and post- inflammatory hyperpigmentation. 1.7 Describe the symptoms and transmission of the common bacterial, viral, fungal, and parasitic diseases that infect the skin. 1.8 Explain the nature and transmission of enveloped viruses 1.9 Describe the symptoms and causes of the common skin disorders, glycation, dermatitis, psoriasis, eczema and vascular conditions. 1.10 Describe the symptoms of hypertrophic and atrophic scarring with reference to ice pick, boxcar, rolling and keloid scars. 1.11 Explain the how the arrangement and synthesis of collagen fibres in the dermal layer determines the morphology of scarring.
LO2. Understand the skin aging process.	2.1 Describe the effects of aging processes on skin morphology
	2.2 Explain the effect of extrinsic factors on skin aging
	2.3 Assess the effects of cell aging on cell pharmacology including the role of telomeres
LO3. Understand the importance of cell biology and biochemistry in aesthetic practice.	3.1 Explain the role of exfoliation in skin rejuvenation and mesotherapy
	3. 2 Evaluate the application of alpha hydroxy acids and beta hydroxy acids in the treatment of a range of skin conditions
	3.3 Explain mode of action and benefits of enzyme peels
	3.4 Analyse the role of fibroblastic growth factors and fibroblasts in skin remodelling
	3.5 Analyse the role of micro needling in collagen-induction therapy, mesotherapy and scar revision
	3.6 Justify the potential benefits of Vitamin C, stem cells and EGFs in skin remodelling
	3.7 Assess the role of drugs and anaesthetics on the pharmacology of nerve impulses, synaptic transmission and the neuromuscular junction
	3.8 Explain the role of sunscreens and how to interpret Sun Protection Factors (SPF)
	3.9 Explain the symptoms, causes and treatment of anaphylaxis
	3.10 Explain how molecular weight and cross linking of hyaluronic acid affects the viscosity and durability of dermal fillers
	3.11 Evaluate the impact of aesthetic practice in the treatment of redundant skin and hyperdynamic expression lines
	3.12 Explain the causes and consequences of vascular occlusion
	3.13 Evaluate the use of hyaluronidase, reversible vs non-reversible dermal fillers & PDO threads in aesthetic practice
	3.14 Analyse the role of detergents, and alcohol-based sanitisers in the disruption of viral envelopes, with reference to Covid-19 control.
4. Understand facial anatomy and the effect of aging on facial bones.	4.1 Identify the major bones and muscles of the face
	4.2 Explain how the change in morphology of facial bones affects the visual appearances associated with aging
	4.3 Describe the facial expressions associated with the muscles of the face
	4.4 Describe the arrangement of the major blood vessels associated with the face
	4.5 Explain how the morphology of the lips affects their appearance, and sensitivity to environmental factors such as UV light.

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