Facial rash differential diagnosis

Facial rash differential diagnosis
Facial rashes Patients often present with quite mild signs when they have a facial lesion or rash — due to embarrassment — and the diagnosis may be tricky. Significant itch suggests atopic dermatitis or contact dermatitis. Face: erosions/crusting Herpes simplex Monomorphic clustered vesicles or crusted papules Often locally recurrent in the same site Swabs: Herpes simplex Herpes zoster ...
Sep 2, 2025
The following differential diagnosis case studies will explore possible causes of facial rashes, with the aim of making it easier to understand the presentations and complexity.
In part I of this two-part article, tables listing common, uncommon, and rare causes of generalized rash are presented to help generate an inclusive differential diagnosis.
Dec 15, 2024
Identify the most common dermatologic diseases that present with a generalized rash. Develop a differential diagnosis of these rashes based on the systematic application of a series of qualifiers including: salient patient history the characteristics of the lesions the location of these lesions and the results of selective diagnostic tests.
Discussion Diagnosing a red rash on the face requires assessment of symptomology, age of onset, rash morphology and 'clinical clues' that help delineate between differentials. Although the list of differential diagnoses is wide, many of the common diagnoses can be made clinically without the need for investigations.
The differential diagnosis of a rash should be based on the morphology of the lesion. To correctly categorize a lesion's morphology, the physician must first identify the primary lesion, the typical element of the eruption.
Rash is a broad term encompassing skin eruptions with a wide variety of causes, from benign to life-threatening. Evaluating a rash involves considering its characteristics (e.g., distribution, morphology, associated symptoms), patient history, and systemic involvement. The SPIT mnemonic (Serious, Probable, Interesting, Treatable) provides a structured approach to identifying and managing…
Touch the skin with a gloved hand to determine if the lesions are flat or raised Press on lesions to see whether they blanch Rub erythematous skin to see if it sloughs Differential Diagnosis Maculopapular rashes Infectious Adenovirus Arbovirus Chikungunya EBV Ehrlichiosis Enterovirus Fifths disease HSV 6 Leptospirosis Lyme Measles ...
It's more noticeable in people with fair skin. -Ddx can be categorized according to the cause of facial redness: primary skin diseases, external insults, and systemic illness. A red rash is also caused by inflammatory skin disease, photosensitive disorders, autoimmune disorders, vascular reactions, and infections. Further Reading
The DermDiag Tool is designed to help you understand your skin condition. This tool does not provide medical advice. To get started, select the part of the body where you are experiencing symptoms. We suggest that you search our Glossary if you are unfamiliar with any dermatological terms.
Apr 2, 2025
• A vesiculobullous rash is also differentiated by distribution; a localized or diffuse distribution helps narrow the differential diagnosis. • Petechial/purpuric rashes are differentiated by the presence or absence of palpable lesions. • Petechiae do not blanch with pressure.
The differential diagnosis of itchy skin, Causes of pruritus. Authoritative facts from DermNet New Zealand.
Part I of this two-part article focuses on differential diagnosis of generalized rashes. Part II focuses on the clinical features that can help distinguish these rashes.11
Pediatric and geriatric considerations In children, many rashes are caused by viral illnesses such as roseola, hand-foot-and-mouth disease and fifth disease. Pediatric rashes may resolve on their own but still require accurate diagnosis to rule out more serious infections like meningitis. In older adults, rashes may present differently due to changes in skin structure and immune response ...
Although it is important to begin the evaluation of generalized rash with an inclusive differential diagnosis, the possibilities must be narrowed down by taking a focused history and looking for ...
Because childhood rashes may be difficult to differentiate by appearance alone, it is important to consider the entire clinical presentation to help make the appropriate diagnosis. Considerations ...
Physicians often have difficulty diagnosing a generalized rash because many different conditions produce similar rashes, and a single condition can result in different rashes with varied appearances. A rapid and accurate diagnosis is critically important to make treatment decisions, especially when …
Materials and Methods: We illustrate with differential diagnoses our clinical case of a generalized rash in a 55-year-old man with pathognomonic signs of a diagnosis, which has received increasing global concern. Conclusion:
Malar rash, also named a butterfly rash, is a common facial presentation of multiple disorders.[1] characterized by an erythematous flat or raised rash across the bridge of the nose and cheeks, which usually spares nasolabial folds. It may be transient or progress to involve other areas of facial skin.[2]
Differential Diagnosis of a Generalized Rash Atopic dermatitis (Eczema) Contact dermatitis Drug reaction (Drug eruption) Viral exanthem (nonspecific) Urticaria (hives) Poison ivy Folliculitis Insect Bites Seborrheic dermatitis Tinea corporis Tinea versicolor (Pityriasis Versicolor) Psoriasis (plaque psoriasis) Psoriasis (Guttate psoriasis) Psoriasis (pustular, erythroderma, and inverse ...
The differential diagnosis of a rash should be based on the morphology of the lesion. This can be considered the first pivotal point in the differential diagnosis. To correctly categorize a lesion's morphology, the physician must first identify the primary lesion, the typical element of the eruption.
Nov 21, 2024
Rashes and skin lesions are a common reason for patient visits to emergency departments and physicians' offices. The differential diagnosis includes a variety of infectious and non-infectious diseases, some of which can be life-threatening. The aim ...
Differential Diagnosis Pediatric Rash Atopic dermatitis Bed bugs Contact dermatitis Drug rash Erythema infectiosum (Fifth disease) Hand-foot-and-mouth disease Henoch-schonlein purpura (HSP) Herpangina Herpes simplex virus (HSV) Infectious mononucleosis Meningitis Measles Molluscum contagiosum Roseola infantum Rubella (German measles) Scabies ...
Aug 6, 2025
2 days ago
The differential diagnosis of pruritus is broad and includes acute and chronic (i.e., at least six weeks of symptoms) presentations. 1, 2 Primary and secondary skin lesions suggest dermatologic ...
Learn about the differential diagnosis of skin rash in pediatrics. Discover causes, symptoms, and treatments for pediatric rashes from experts.
In the final part, differential diagnosis is proposed in the form of various tables summarizing the different cutaneous signs, providing readers with a complete toolkit to assist with diagnosis.
Oct 30, 2024
Jul 15, 2025
The differential diagnosis for febrile patients with a rash is extensive. Diseases that present with fever and rash are usually classified according to the morphology of the primary lesion. Rashes ...
Some pustules are sterile and are due to inflammatory skin disease This topic provides a differential diagnosis of pustular skin conditions. Acute mainly pustular generalised eruptions Acute mainly pustular localised eruptions Chronic mainly pustular eruptions Acute mainly pustular generalised eruptions Generalised pustular psoriasis Febrile ...
Rashes are extremely common in newborns and can be a significant source of parental concern. Although most rashes are transient and benign, some require additional work-up. Erythema toxicum ...
National report - Scaly, erythematous papular and papulopustular rashes on the face are a common sight for dermatologists, and a number of possible diagnoses come to mind.
The ability to narrow the differential diagnosis for patients with blistering skin lesions is essential for the prompt recognition of life-threatening disorders and the appropriate management of other blistering diseases (algorithm 1).
May 6, 2025
A rash is an area of skin that is irritated, inflamed or swollen. Rashes can occur due to various causes. Discover 36 common skin rashes.
Diagnosis of chronic blistering diseases often requires skin biopsy for histopathology and direct immunofluorescence. A blood test for specific antibodies (indirect immunofluorescence) may also prove helpful in making the diagnosis of an immunobullous disease.
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Key Features: Symmetrical maculopapular rash, often pruritic, occurring days after medication use. Diagnostic Criteria: Clinical diagnosis. Treatment: Discontinue offending drug, antihistamines. Allergic Bronchopulmonary Aspergillosis (ABPA): Key Features: Chronic cough, wheezing, mucus plugs; history of asthma or cystic fibrosis.
Jun 3, 2025
Apr 10, 2024
After several weeks, the rash fades and is followed by des-quamation of the skin, especially on the face, in skin-folds, and on the hands and feet, potentially lasting four to six weeks.9 With a sensitivity of 90% to 95%, throat culture is the first-choice method for diagnosis of group A streptococcal infection, but this is not always practical ...
The cause of many rashes can be diagnosed on clinical inspection of the rash alone. The morphology of a rash is therefore important. Morphological terms include: Macule - a non-raised, usually well-demarcated, coloured area of skin. Papule - a raised, usually round, well-demarcated lesion <5 mm in diameter.
Adult-onset dermatomyositis, Dermatopolymyositis in adults, Wagner-Unverricht syndrome in adults, Polymyositis with skin involvement in adults. Authoritative facts from DermNet New Zealand.
A thorough guide to Rash in Children: Differential Diagnoses aimed at medical student finals and OSCEs.
Petechia: are pin-point, non-blanching red lesions of the skin or conjunctiva, usually <0.5cm caused by capillaries leaking blood into the skin. Occasion-ally, they can be raised (palpable).
The generalized rash: part I. Differential diagnosis. Am Fam Physician. 2010 Mar 15;81 (6):726-34. Ely JW, Seabury Stone M. The generalized rash: part II. Diagnostic approach. Am Fam Physician. 2010 Mar 15;81 (6):735-9. Rayala BZ, Morrell DS. Common Skin Conditions in Children: Neonatal Skin Lesions. FP Essent. 2017 Feb;453:11-17. Rayala BZ ...
Rash in Infants and Young Children - Etiology, pathophysiology, symptoms, signs, diagnosis & prognosis from the Merck Manuals - Medical Professional Version.
Pigmentation disorders are commonly diagnosed, evaluated, and treated in primary care practices. Typical hyperpigmentation disorders include postinflammatory hyperpigmentation, melasma, solar ...
In part I of this two-part article, tables listing common, uncommon, and rare causes of generalized rash are presented to help generate an inclusive differential diagnosis. The tables describe the key clinical features and recommended tests to help accurately diagnose general-ized rashes.
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