Darier sign is a skin finding where rubbing or scratching a lesion makes it become raised, red, and itchy (a “wheal-and-flare” reaction). It is most commonly used in clinical examinations to support a diagnosis of cutaneous mastocytosis (mast cell–related skin lesions). It is a physical exam sign, not a cosmetic procedure or treatment. It may be relevant in both reconstructive and aesthetic settings because it can affect how skin lesions behave during evaluation, surgery planning, or post-procedure monitoring.

Koebner phenomenon is when new skin lesions appear on previously normal skin after injury or irritation. It is most often discussed in dermatology in conditions like psoriasis and vitiligo. It matters in both cosmetic and reconstructive care because procedures that stress the skin can act as triggers.

follicular plugging is a descriptive clinical term for material that blocks the opening of a hair follicle. The “plug” is typically a mix of keratin (dead skin cells) and skin oil (sebum). It is commonly discussed in cosmetic dermatology because it can create visible bumps, rough texture, or “clogged pores.” It is also used in medical dermatology to describe findings in acne-related and certain inflammatory skin or scalp conditions.

Desquamation is the shedding or peeling of the outermost layers of skin. It can be a normal process (everyday skin turnover) or a visible sign of irritation, inflammation, or healing. In cosmetic dermatology and plastic-surgery care, desquamation often describes controlled peeling after resurfacing treatments. In reconstructive and medical settings, desquamation can also describe skin changes seen with certain rashes, infections, or wound healing.

maceration is the softening and whitening of skin or tissue after prolonged exposure to moisture. In clinical care, it most often describes moisture-related breakdown of skin around wounds, incisions, dressings, or skin folds. In some surgical and laboratory contexts, the word can also describe controlled softening or mechanical fragmentation of tissue. It is relevant in both cosmetic and reconstructive settings because skin integrity strongly affects healing and scarring.

epithelialization is the process by which new surface skin (epithelium) grows to cover a wound or treated area. It is a key phase of wound healing that restores the skin’s barrier and surface continuity. In cosmetic and plastic surgery, clinicians track epithelialization after procedures that remove or injure the superficial skin. It is also central in reconstructive care when wounds heal by “growing in” from the edges rather than being fully closed with stitches.

Granulation tissue is new, pink-to-red tissue that forms in a healing wound. It is made of tiny new blood vessels, connective tissue, and healing cells. It fills in a wound bed and supports skin closure and scar formation. It is relevant in both cosmetic and reconstructive care because it underpins how surgical and resurfacing wounds heal.

eschar is a dry or sometimes leathery layer of dead tissue on the skin surface. It often looks black, brown, or dark gray and can form after injury or impaired blood supply. Clinicians use the term in both reconstructive care (burns, wounds) and in evaluating complications after cosmetic surgery. It is a clinical finding, not a treatment or a product.

necrosis is the death of living tissue in the body. It happens when cells are irreversibly injured, most often from loss of blood supply, infection, pressure, chemicals, or trauma. In cosmetic and plastic surgery, necrosis is usually discussed as a complication risk (for example, skin or nipple-areola compromise). It is also used in reconstructive care to describe tissue loss that may require wound management or revision.

purulent drainage is thick fluid that contains pus, often appearing yellow, green, or tan. It is a clinical description used to document drainage that suggests an inflammatory or infectious process. In cosmetic and reconstructive surgery, it may be noted during wound checks, around incisions, or in surgical drains. The term helps clinicians communicate what they see and decide what evaluation may be needed.

serous drainage is a clear to pale yellow fluid that can seep from a healing wound or collect in a surgical space. It is largely made of plasma and inflammatory fluid, and it is common in early wound healing. In cosmetic and plastic surgery, serous drainage is often discussed when monitoring incisions, dressings, and surgical drains. It can be seen in both cosmetic procedures (appearance-focused) and reconstructive procedures (function- and repair-focused).

exudate is fluid that leaks out of blood vessels into nearby tissues, most commonly at a wound or surgical site. It can contain water, proteins, inflammatory cells, and sometimes microorganisms. Clinicians use the appearance and amount of exudate to understand how a wound is healing or whether complications may be developing. It is discussed in both cosmetic/plastic surgery recovery and broader reconstructive wound care.

edema is swelling caused by excess fluid collecting in body tissues. It can be localized (for example, around the eyes after blepharoplasty) or widespread (for example, both legs). In cosmetic and plastic surgery, edema is most commonly discussed as post-procedure swelling and as a sign clinicians monitor during healing. In reconstructive care, edema may reflect inflammation, venous problems, or lymphatic dysfunction (such as lymphedema).

induration means an area of tissue feels firmer, harder, or “thicker” than the surrounding tissue. It is a clinical description (a physical finding), not a specific cosmetic procedure or product. Clinicians most often identify induration by touch (palpation) during an exam. It is used in both cosmetic/plastic surgery and reconstructive care to describe healing changes or potential complications.

A painful lesion is an area of abnormal tissue or a noticeable skin or soft-tissue change that causes pain or tenderness. It is a descriptive clinical term, not a single diagnosis. It is used in both cosmetic and reconstructive settings to document symptoms and guide evaluation. In plastic surgery, it often helps frame decisions about observation, biopsy, removal, and reconstruction.

stinging is a short, sharp sensory discomfort often described as “prickling” or “biting.” It is a symptom (what a patient feels), not a diagnosis or a procedure. In cosmetic and plastic surgery settings, stinging commonly comes up during topical skincare use and after minimally invasive or energy-based treatments. It can also be reported after surgical procedures as part of normal healing or, less commonly, as a sign that needs clinical evaluation.

burning is a descriptive term for a hot, stinging, or searing sensation felt on the skin or in deeper tissues. In cosmetic and plastic surgery, burning commonly refers to a symptom patients report during recovery or after skin treatments. It can also describe intentional, controlled heat effects used by clinicians (for example, cautery, laser, or radiofrequency) to cut, coagulate, or remodel tissue. burning may be discussed in both cosmetic and reconstructive care, depending on the procedure and clinical context.

pruritus is the medical term for itching. It describes an uncomfortable skin sensation that creates an urge to scratch. It is used in both cosmetic and reconstructive settings to document symptoms during healing or skin reactions. It can be localized (one area) or generalized (widespread), and it may be acute or chronic.

xerosis is the medical term for unusually dry skin. It describes skin that feels rough, tight, flaky, or “ashy” due to reduced water and oil in the outer layer. Clinicians use the term in both medical dermatology and aesthetic (cosmetic and reconstructive) care. In cosmetic and plastic surgery settings, xerosis is commonly discussed because it can affect skin texture and procedure tolerance.

Seborrhea is an increase in sebum (skin oil) production that can make skin and scalp look shiny or greasy. It is a clinical term used in dermatology and cosmetic care to describe oiliness and related surface changes. Seborrhea is often discussed alongside seborrheic dermatitis, a separate but commonly associated inflammatory, flaky rash. It matters in both cosmetic and reconstructive settings because skin condition can affect healing, comfort, and appearance.