What causes roseola in infants?

Written by Huang Kun Mei

Pediatrics

Updated on March 05, 2025

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Exanthema subitum in children is caused by a viral infection, generally starting abruptly with a fever above 39°C, and a rash appears as the fever subsides. The rash is roseola. During the period of exanthema subitum, it's important to avoid drafts, ensure indoor ventilation twice a day, and keep the air fresh. Since exanthema subitum is caused by a viral infection, it is necessary to treat children with antiviral medications. It is recommended to use traditional Chinese medicine antivirals because they tend to have fewer side effects. During the exanthema subitum period, avoid going out, and children should not attend kindergarten to steer clear of crowded places.

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Written by Li Jiao Yan

Neonatology

1min 23sec

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What to do with infantile sudden rash

Infantile roseola is a common febrile rash disease in infants and young children, primarily caused by viral infections. The main typical symptoms are high fever, usually around 40 degrees Celsius, followed by a fever lasting three to five days. When the fever subsides, a rash appears simultaneously or afterwards, persisting for 2-3 days before gradually fading. Some children may also experience vomiting, diarrhea, or convulsions during high fever. Therefore, the treatment for infantile roseola is generally symptomatic. During high fever, physical cooling is applied, and appropriate antipyretics are used to prevent febrile convulsions. It is important to ensure adequate hydration and provide easily digestible food. Appropriate heat-clearing and detoxifying traditional Chinese medicines or patent medicines can also be given. If convulsions occur, it is urgent to seek medical attention, and doctors can administer suitable sedatives and antispasmodic medications based on the child's condition. Other symptoms, like vomiting and diarrhea, should be treated with appropriate antidiarrheals or digestive aids as needed, to help alleviate discomfort in the child.

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Written by Li Jiao Yan

Neonatology

1min 33sec

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How should one handle roseola in toddlers?

Infantile roseola is a common febrile rash illness in infants, the main manifestation of which is high fever lasting for three to five days. When the fever subsides, a maculopapular rash appears on the skin. During the illness, it is important to ensure that the room is well-ventilated and to avoid taking the child to crowded places to prevent worsening of the condition due to cross-infection. Additionally, if the child has a high fever or feels unwell, appropriate fever-reducing treatments should be given. If physical cooling is not effective, suitable antipyretic medicine should be administered. Also, the child should not wear too many clothes or be covered with thick blankets during the fever to avoid impairing heat dissipation. If the child sweats a lot when the fever subsides, be sure to change their clothes promptly to prevent catching cold. During the illness, the child should drink plenty of water, preferably warm. As for diet, it is important to consume light and easily digestible food and properly supplement with vitamin C. If breastfeeding, the mother should be cautious not to consume spicy and greasy food since the baby's gastrointestinal tract is relatively weak during illness. If the mother's diet is too spicy or greasy, it could potentially exacerbate the baby's gastrointestinal burden, leading to diarrhea or vomiting.

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Written by Yao Li Qin

Pediatrics

1min 4sec

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Can air conditioning be used for children with roseola infantum?

Exanthema subitum, also known as roseola infantum, is a common pediatric disease caused by a viral infection that results in fever and rash. When a child's temperature exceeds 38.5℃, it is necessary to administer antipyretic medication. If the temperature is below 38.5℃, physical methods to reduce the fever are sufficient. Since the child is in a continuous state of high fever, it is acceptable to use air conditioning. Air conditioning can maintain a suitable indoor temperature and humidity level. The appropriate temperature and humidity can make the child more comfortable and also aid in reducing the fever. Of course, it is crucial to avoid exposing the child directly to the airflow from the air conditioner. Additionally, the air in air-conditioned rooms can be quite dry, so it is essential to ensure that the child drinks plenty of fluids.

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Written by Yao Li Qin

Pediatrics

54sec

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What should not be eaten with baby sudden rash?

Roseola infantum is caused by human herpesvirus types 6 and 7, a common acute rash infectious disease in pediatrics, also known as baby roseola. Its main characteristic is high fever for 3-4 days, followed by a rash as the fever subsides. Since roseola infantum is clearly a viral infection, its treatment mainly involves symptomatic management. For children in pediatric emergency care, while actively managing symptoms, it is essential to ensure adequate hydration and nutrition, so normal diet is still necessary. However, the diet should be light and easy to digest. Foods that are difficult to digest, such as large fish, large pieces of meat, or raw and cold irritants like some beverages or colder foods, should be avoided.

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Written by Huang Kun Mei

Pediatrics

47sec

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What causes roseola in infants?

Exanthema subitum in children is caused by a viral infection, generally starting abruptly with a fever above 39°C, and a rash appears as the fever subsides. The rash is roseola. During the period of exanthema subitum, it's important to avoid drafts, ensure indoor ventilation twice a day, and keep the air fresh. Since exanthema subitum is caused by a viral infection, it is necessary to treat children with antiviral medications. It is recommended to use traditional Chinese medicine antivirals because they tend to have fewer side effects. During the exanthema subitum period, avoid going out, and children should not attend kindergarten to steer clear of crowded places.