What is a Maculopapular Rash?

A maculopapular rash.
Someone allergic to amoxicillin might develop a maculopapular rash.
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  • Written By: Adam Hill
  • Edited By: Bronwyn Harris
  • Last Modified Date: 17 September 2014
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A maculopapular rash is a skin condition characterized by the presence of both macules and papules on the skin. When a person's skin displays a maculopapular rash, it is usually red, and covered with many small bumps, not unlike sandpaper at times. A maculopapular rash can have any of numerous causes, but it most often appears as a symptom of scarlet fever, measles, heat rash, and some hemorrhagic fevers. An allergic reaction to the antibiotic amoxicillin can also take on this appearance.

The two elements present in every maculopapular rash are macules and papules. Macules are areas of skin discoloration that are usually less than about half an inch (one cm) in diameter. They are neither elevated nor depressed, and can take on nearly any color. Macules themselves can have various causes, including certain skin diseases, but also including conditions, such as hyperpigmentation, that are in no way pathological.

Papules are small, round elevations of the skin that don't appear to contain any fluid. They also vary in color from pink or red, to purple, or even brown. Like macules, they usually present as a symptom of a skin disease. Heat rash is one of these diseases, and occurs primarily in hot, tropical climates due to the clogging of the sweat glands, and a subsequent bacterial infection. Heat rash is usually present only on a localized area, and is most common in infants and small children, because their sweat glands are less developed than those of adults.

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Maculopapular rashes, which combine both of the above elements, are most often part of a serious or acute condition. Measles is among these, and apart from the rash, is characterized by a high fever, sometimes reaching 104 degrees Fahrenheit (40 degrees C). The measles rash develops some time after the fever, and can change colors from red to brown before eventually disappearing.

Scarlet fever is characterized in part by the appearance of a maculopapular rash, starting one to two days after the fever itself. Three to four days later, it fades, and the skin of the affected areas peels away, which is a process that sometimes takes weeks. Other ailments characterized by fevers also cause a maculopapular rash. One of the more serious of these is Marburg hemorrhagic fever. The onset of symptoms in this case is very rapid, with the rash developing about five days later. Marburg hemorrhagic fever ends in the death of almost a quarter of all its victims.

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anon108677
Post 4

My grandson has had them for about two months now. He has been to Children's and one other hospital and both missed the diagnosis. I took him to his regular doctor and the was a nurse practitioner she missed the diagnosis. Went to his medical doctor and she diagnosed him with erythematous maculopapular rash and prescribed Keflex for it and it has already started to go away, but we are still going to see a dermatologist. Hope this helps.

pleats
Post 3

@earlyforest -- I would take the child to a dermatologist so that he can take a biopsy and see what's going on.

In the meantime, maybe you could try a stronger cream? As long as that doesn't irritate her skin, maybe that could help.

EarlyForest
Post 2

I have a friend whose daughter has been having a pruritic maculopapular rash on her arms and shoulders recently.

It comes and goes, but seems to spread a little bit more each time it appears.

She's been using topical creams, but it doesn't seem to help that much anymore.

Does anybody know what could cause this, or some steps to take?

naturesgurl3
Post 1

One kind of maculopapular rash is an erythematous maculopapular rash, which consists of a red area on the skin (the macular part) with raised bumps on it (the papules).

Measels is a common erythematous maculopapular rash.

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