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  1. The noun rash, which first appeared in English in the late 17th century, probably comes ultimately from the Latin verb rādere, meaning “to scrape, scratch, shave.” The adjective rash appears to be about two centuries older, and comes from a Middle English word meaning “active, quick, eager.”

    • Clinical Features
    • Differential Diagnosis
    • Evaluation
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    1. Key elements from the history include: 1.1. Distribution and progression of the skin lesions 1.2. Recent exposures (sick contacts, foreign travel, sexual history and vaccination status) 1.3. Any new medications

    Physical Exam

    1. Pay specific attention to vital signs 1.1. A rash associated with fever or hypotension should make you worry about potentially deadly diagnoses 2. Perform a careful physical exam 2.1. Undressing the patient to fully examine the trunk and the extremities 2.2. Look at palms, soles and mucous membranes 2.3. Touch the skin with a gloved hand to determine if the lesions are flat or raised 2.4. Press on lesions to see whether they blanch 2.5. Rub erythematous skin to see if it sloughs

    1. Infectious 1.1. Adenovirus 1.2. Arbovirus 1.3. Chikungunya 1.4. EBV 1.5. Ehrlichiosis 1.6. Enterovirus 1.7. Fifths disease 1.8. HSV 6 1.9. Leptospirosis 1.10. Lyme 1.11. Measles 1.12. Meningococcemia 1.13. Mycoplasma 1.14. Parvovirus (B19) 1.15. Primary HIV 1.16. Psittacosis 1.17. Rickettsia 1.18. Rubella 1.19. Rubeola 1.20. Scabies 1.21. Secondary syphilis 1.22. Streptobacillus moniliformis 1.23. Typhoid fever/typhus 1. Noninfectious 1.1. Acrodermatitis enteropathica 1.2. Allergy 1.3. Der...

    Febrile 1. Diffuse distribution 1.1. Varicella(chickenpox) 1.2. Smallpox 1.3. Monkeypox 1.4. Disseminated gonococcal disease 1.5. DIC 1.6. Purpural fulminans 2. Localized distribution 2.1. Necrotizing fasciitis 2.2. Hand-foot-and-mouth disease Afebrile 1. Diffuse distribution 1.1. Bullous pemphigoid 1.2. Drug-Induced bullous disorders 1.3. Pemphigus vulgaris 1.4. Phytophotodermatitis 1.5. Erythema multiformemajor 1.6. Bullous impetigo 2. Localized distribution 2.1. Contact dermatitis 2.2. Her...

    1. Necrotizing soft tissue infections 1.1. Necrotizing fasciitis 1.2. Necrotizing myositis 1.3. Necrotizing cellulitis 2. Purpura fulminans 3. Drug rash 4. Levamisole toxicity 5. Heparin-induced skin necrosis 6. Warfarin-induced skin necrosis

    Maculopapular rashes visual diagnosis

    1. Chickenpox 2. Chickenpox 3. Chikungunya 4. Measles 5. Miliaria(Heat rash) 6. Poison ivy/Oak/Sumac 7. Poison ivy/Oak/Sumac 8. Scabies 9. Shingles

    Vesiculobullous rashes visual diagnosis

    1. Bullous pemphigoid 2. Bullous impetigo(after the bulla have broken) 3. Bullosis diabeticorum 4. Dermatitis herpetiformis 5. Erythema multiforme 6. Gonococcal 7. Monkeypox 8. Nectrotizing fasciitis 9. Pemphigus vulgaris 10. Poison ivy/Oak/Sumac 11. Poison ivy/Oak/Sumac 12. Phytophotodermatitis 13. Shingles 14. Smallpox 15. Varicella 16. Varicella

    1. Staphylococcal scalded skin syndrome 2. Toxic epidermal necrolysis 3. Kawasaki disease 4. Scarlet fever 5. Urticaria/anaphylaxis 6. Exfoliative erythroderma 7. DRESS 8. Cellulitis 9. Acute generalized exanthematous pustulosis 10. Drug eruption 11. Erythema multiforme 12. Vancomycin infusion reaction.

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  3. Apr 21, 2022 · Rashes can be thought of as a dysfunctional community of skin cells. Your skin harbors dozens of distinct cell types, including those that form blood vessels, nerves and the local immune system of the skin. For decades, clinicians have largely been diagnosing rashes by eye.

  4. Mar 26, 2024 · Diagnosis. Skin Care. When the immune system is healthy, it protects the body from disease and infection. In autoimmune diseases, the immune system mistakenly attacks the cells, tissues, and organs of the body. Rashes can occur as part of these attacks.

  5. Fever is an elevated body temperature that occurs when the body's thermostat (located in the hypothalamus) resets at a higher temperature, primarily in response to an infection. Elevated body temperature that is not caused by a resetting of the temperature set point is called hyperthermia. Normal body temperature varies by. Site of measurement.

    • Larry M. Bush
  6. Apr 3, 2024 · What Are Hives? Preventing Spreading. Seeking Medical Care. If a rash seems to move around your body, it is likely hives. Hives, medically known as urticaria, are a common rash that can be triggered by many different substances. Hives come and go, with some people experiencing them moving from one part of the body to the next.

  7. RASH meaning: 1 : a group of red spots on the skin that is caused by an illness or a reaction to something; 2 : a series of usually unpleasant things or events that happen in a short period of time

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