Type of Rash
Macules – flat erythematous areas of skin
Papules – raised erythematous areas of skin
Both will blanch under pressure
Rubella (only macules)
HHV6 / HHV7
Purpuric / petechial
Non-blanching red/purple coloursed spots. Test them with a glass
Raised, dome shaped lesions, <5mm diameter. Contain colourless fluid
Hand, foot and mouth
Pustular / bullous
Raised, dome shaped lesions, >5mm diameter. Contain colourless fluid or pus
Scalded skin syndrome
Epidermal layer peels away. Most commonly found in the extremities.
After Scarlet fever
Mongolian Blue Spot
Common in Asian and Black children. Clinically significant as it may be mistaken for bruising. Typically occurs on the lower back.
Most disappear by age 5-6, and nearly all by puberty.
None. Present at birth and fades over time, although some adults may still have a visible rash
2- 5 days
Very common – up to 50% of newborns, 2-5 days after birth. The cause is unknown. Appears a blotchy red patches on the skin, sometimes with papules and pustules
Usually resolves without treatment within a few days
Strawberry Naevus aka Strawberry Haemangioma
6-7 weeks old at presentation
Not present at birth, but develops during the first few weeks of life. A raised red lumpy spot, well demarcated. Can occur anywhere on the body, and grows for up to 18 months. After this time, will recede, and eventually disappear (usually by age 7). Can also occur in the trachea.
Usually none, but if around the eyes, or in the trachea may need to be removed. Can be done via laser or surgically, but they tend to bleed a lot! Can also try to reduce the size with topical steroids and propanolol.