rash
Let an agent explain rashes in general terms, relay types, common causes and warning signs from dermatology and public health sources, route non-blanching rashes with fever and rashes with breathing difficulty to emergency services, describe the named types, and distinguish rashes from bruises, birthmarks, chronic skin diseases and hives as a specific type, without diagnosing individuals.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain rashes in general terms, relay types, common causes and warning signs from dermatology and public health sources, route non-blanching rashes with fever and rashes with breathing difficulty to emergency services, describe the named types, and distinguish rashes from bruises, birthmarks, chronic skin diseases and hives as a specific type, without diagnosing individuals.
A change in the colour, texture or appearance of the skin, which may be red, raised, blotchy, itchy or painful and localised or widespread, caused by infections, allergies, drugs, irritants, heat and autoimmune or other diseases; the registry aliases describe types such as diffuse, papular, blotchy red, ankle and purpuric rashes, and exanthem, a widespread rash with fever typical of viral infections such as measles. A rash with fever that does not fade under pressure from a glass may be meningococcal sepsis, and a rash with swelling or breathing difficulty may be anaphylaxis, both emergencies needing emergency services immediately.
What it is for: Not applicable; a clinical sign.
It can be explain types and causes in general terms; relay warning signs; describe named types; route emergencies.
Distinguishing features
Visible skin change
Many causes
Warning patterns
Varied morphology
What it looks like
Areas of red, raised, spotted, blistered or discoloured skin; purpuric rashes are purple and do not blanch.
Physical character
glass test: non-blanching rash with fever is an emergency note - meningitis charities
classic exanthems: measles, rubella, scarlet fever, chickenpox and others note
registry parents: clinical sign, skin symptom note
How it is recognised
Change in skin appearance
Diffuse rash, papular rash, ankle rash, blotchy red rash, purpuric rash, exanthem
Bruises come from injury; birthmarks are present from birth; chronic diseases such as psoriasis persist; hives are raised itchy wheals
Related models
is a kind of - in registry terms
includes -
can signal - if non-blanching with fever
is contrasted with -
In practice
Families and kinds
macular and papular rashes
vesicular rashes
purpuric and petechial rashes
urticarial rashes
viral exanthems
drug rashes
Standards and regulation
Clinical guidelines such as NICE on fever in children
Vaccination programmes for measles and other rash illnesses
Failure modes and hazards
Missing meningococcal or anaphylaxis signs
Diagnosing from photos
Stopping prescribed drugs without advice
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.rash
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand What a rash is.
Science.
Definition
Definition.
Definition
Definition.
- Does someone have a rash that does not fade under a glass with fever, or a rash with swelling or breathing difficulty, in which case call emergency services now? boundary
- What is a rash, and how does it differ from bruises, birthmarks, chronic skin disease and hives? definition
Types
Named types.
Types
Types.
- What are diffuse, papular, ankle, blotchy, purpuric rashes and exanthems? definition
- Which entry fits the specific type? action
Causes Causes.
Science.
Infection
Infections.
Infection
Infection.
- Which infections cause rashes, and why are measles and chickenpox important? provenance
- Which references are standard? provenance
Allergy and drugs
Allergies and drugs.
Allergy and drugs
Allergy and drugs.
- How do allergic and drug reactions cause rashes, and which are severe? provenance
- Which sources are cited? provenance
Care When to seek care.
Regulation.
Warning signs
Warning signs.
Warning signs
Warning signs.
- What warning signs do health services list for rashes? provenance
- Which entry fits glass test? action
Skin tones
Rashes on darker skin.
Skin tones
Skin tones.
- How can rashes look different on darker skin, as dermatology resources note? provenance
- Which entry fits skin of colour dermatology? action
Context Public health.
Context.
Vaccines
Vaccines.
Vaccines
Vaccines.
- How have vaccines reduced measles and rubella rashes? provenance
- Which entry fits MMR vaccine? action
Heat
Heat rash.
Heat
Heat.
- What is heat rash, and how is it prevented? provenance
- Which entry fits miliaria? action
What the second pass must settle
- Should purpuric rash be a separate entry?
- How should dermatology sources be linked?
- Should drug rashes such as SJS be linked?