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Related Concept Videos

Hypersensitivity Reactions: Immune-Complex Reactions01:19

Hypersensitivity Reactions: Immune-Complex Reactions

Type III hypersensitivity reactions occur when antigen–antibody complexes form and activate the complement system. Normally, these complexes help the clearance of antigens by phagocytes and red blood cells. However, when large numbers of immune complexes are present, they can deposit in tissues—particularly in the walls of blood vessels—leading to inflammation and tissue injury. These deposits trigger complement activation and neutrophil recruitment, resulting in serum sickness, a systemic...
Staphylococcal Skin Infections01:29

Staphylococcal Skin Infections

Staphylococcus aureus is a Gram-positive coccus that resides harmlessly on the skin and mucous membranes of healthy individuals. When the skin barrier is breached, it can shift from a commensal to an opportunistic pathogen. This transition is facilitated by surface adhesins, such as clumping factor B and S. aureus surface protein G (SasG), which bind to structural proteins, including loricrin and cytokeratin, in the damaged epidermis. Protein A, another key factor, binds the Fc region of...
Hypersensitivities01:30

Hypersensitivities

Hypersensitivity, also known as a hypersensitivity reaction or allergic reaction, is a condition where the body's immune system reacts abnormally to a foreign substance. Such substances, that cause hypersensitivity are referred to as an allergen, could be something typically harmless to most people, like pollen or certain foods.
Types of Hypersensitivities
Hypersensitivity reactions are categorized into four types: Type 1, Type 2, Type 3, and Type 4. Each type has a distinct mechanism...
Skin Diseases and Disorders01:23

Skin Diseases and Disorders

Skin is the first line of defense and encounters a variety of microbes. Some pathogenic strains are often the cause of a broad range of infections of the skin and other body systems. These conditions can affect people of all ages and may have different causes, including genetic factors, infections, autoimmune reactions, environmental factors, and lifestyle choices.
Gram-positive Staphylococcus spp. and Streptococcus spp. are responsible for many of the most common skin infections. However, many...
Acne Infection01:27

Acne Infection

Acne is a multifactorial skin condition primarily affecting adolescents and young adults, with a global prevalence estimated to exceed 75% in this demographic. The condition is characterized by the formation of comedones (blackheads and whiteheads), papules, pustules, nodules, and, in severe cases, cysts, particularly in areas rich in sebaceous glands such as the face, neck, chest, and back. The pathogenesis involves increased sebum production, follicular hyperkeratinization, colonization by...
Drug Toxicity: Allergic Reactions01:30

Drug Toxicity: Allergic Reactions

Drug-related allergies are immune-mediated responses triggered by the administration of pharmacological agents. These hypersensitivity reactions are classified based on the immune mechanisms involved. The four primary types—Type I, II, III, and IV—are mediated by different immunological pathways and exhibit distinct clinical manifestations.Type I Hypersensitivity/ IgE-Mediated Reactions: Immunoglobulin E (IgE) immediately mediates Type I hypersensitivity reactions. Upon initial exposure to a...

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Related Experiment Video

Updated: May 31, 2026

Granulocyte-dependent Autoantibody-induced Skin Blistering
12:23

Granulocyte-dependent Autoantibody-induced Skin Blistering

Published on: October 12, 2012

[Sensitive skin: a complex syndrome].

J Escalas-Taberner1, E González-Guerra, A Guerra-Tapia

  • 1Servicio de Dermatología, Hospital Universitario de Son Espases, Palma de Mallorca, España. jetpalma@hotmail.com

Actas Dermo-Sifiliograficas
|July 16, 2011
PubMed
Summary
This summary is machine-generated.

Sensitive skin, affecting up to 50% of Europeans, involves unpredictable hyperreactivity. Diagnosis is challenging due to subjective symptoms and lack of predictive tests, impacting quality of life.

Related Experiment Videos

Last Updated: May 31, 2026

Granulocyte-dependent Autoantibody-induced Skin Blistering
12:23

Granulocyte-dependent Autoantibody-induced Skin Blistering

Published on: October 12, 2012

Area of Science:

  • Dermatology
  • Epidemiology
  • Biophysics

Background:

  • Sensitive skin is increasingly reported, with an estimated 50% prevalence in Europe.
  • It is characterized by hyperreactivity, though its pathogenesis is poorly understood, with biophysical mechanisms suggested.
  • Diagnosis is difficult due to reliance on patient reports and lack of predictive tests.

Purpose of the Study:

  • To explore the characteristics and diagnostic challenges of sensitive skin.
  • To highlight the impact of sensitive skin on quality of life and potential psychiatric comorbidities.
  • To emphasize the importance of patient-physician collaboration in managing sensitive skin.

Main Methods:

  • Review of epidemiologic studies on sensitive skin prevalence.
  • Analysis of clinical characteristics and diagnostic difficulties.
  • Discussion of patient-reported outcomes and quality of life impacts.

Main Results:

  • High prevalence of sensitive skin reported globally, particularly in Europe.
  • Significant interindividual variability in skin sensitivity and triggers.
  • Considerable impact on quality of life, with associated psychiatric symptoms.

Conclusions:

  • Sensitive skin is a common condition with complex, poorly understood mechanisms.
  • Objective diagnosis remains a challenge, necessitating a patient-centered approach.
  • Effective management requires strong patient cooperation and physician persistence.