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Professional /
Dermatologic Disorders /
Hypersensitivity and Inflammatory Skin Disorders /
... /
Introduction to Hypersensitivity and Inflammatory Skin Disorders /

OTHER TOPICS IN THIS CHAPTER

Hypersensitivity and Inflammatory Skin Disorders
Introduction to Hypersensitivity and Inflammatory Skin Disorders
Acute Febrile Neutrophilic Dermatosis
Drug Eruptions and Reactions
Erythema Multiforme
Erythema Nodosum
Granuloma Annulare
Panniculitis
Pyoderma Gangrenosum
Stevens-Johnson Syndrome (SJS) and Toxic Epidermal Necrolysis (TEN)

ADDITIONAL CONTENT

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Pressure Ulcers
Pressure ulcers (PUs) are defined as areas of necrosis and ulceration where tissues are compressed between bone and hard surfaces, such as a bed or chair. There are many risk factors for PUs, which include age > 65 years, decreased mobility, and impaired sensation, among others. Of the main factors that influence the development of PUs, which of the following contributes to PUs but is not a direct cause?  
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Introduction to Hypersensitivity and Inflammatory Skin Disorders

By

Julia Benedetti

, MD,

  • Clinical Instructor in Dermatology
  • Harvard Medical School
  • Adjunct Clinical Instructor
  • Tufts University School of Medicine

Last full review/revision Jul 2020| Content last modified Jul 2020
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The immune system plays a significant role in a large number of skin disorders, including dermatitis, sunlight reactions, and bullous diseases. Although all of these disorders involve some level of inflammation, certain skin disorders are primarily characterized by their inflammatory component or as a hypersensitivity reaction, be it to a drug, infection, or cancer. These disorders include

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Pseudofolliculitis Barbae
Acute Febrile Neutrophilic Dermatosis
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