What is roseola infantum?

Written by Yan Xin Liang

Pediatrics

Updated on January 26, 2025

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Roseola infantum is a disease characterized by a fever, followed by a rash after the fever subsides. This disease is caused by an infection with human herpesvirus type 6 or type 7. Typically, it starts with a fever lasting three to five days, which can be moderately high. Generally, a rash appears after the fever subsides, primarily on the torso but it can also spread to the limbs. The rash usually fades within about two days and leaves no scars once it has disappeared.

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Written by Yan Xin Liang

Pediatrics

1min 14sec

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What to do with sudden rash in toddlers?

Roseola in infants is an acute febrile infectious disease caused by human herpesvirus type 6 or type 7. During the acute phase, this disease often presents with a sudden high fever, with temperatures reaching up to 39°C (102.2°F), and even exceeding 40°C (104°F). The fever usually lasts for 3-5 days. During this time, it is important to monitor the baby's temperature closely. If a high fever occurs, timely antipyretic treatment should be administered to prevent potential high fever convulsions. Attention should also be given to the baby's mental response; if the baby appears lethargic and the fever persists, symptomatic treatment should be provided promptly. It is also crucial to be vigilant for any potential complications. Most children with roseola will develop a rash after 3-5 days of fever, which lasts about two days. If there are no complications, they can generally recover. Therefore, there is no need to be overly anxious if a child contracts roseola, as it is a self-limiting disease that typically resolves within 5-7 days.

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Written by Yan Xin Liang

Pediatrics

39sec

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Can children with roseola go outside?

Roseola infantum, also known as exanthema subitum, is caused by human herpesvirus type 6 or type 7. It is an acute febrile infectious disease that evolves over time. The fever may last three to five days. It's important to keep warm, especially in winter, as failure to do so can worsen the child's condition. However, going out is generally fine as long as proper precautions are taken to avoid aggravating the child's illness. Still, it is crucial to intensify care, maintain a light diet, and provide a quiet and comfortable environment for the child, all of which are beneficial for recovery.

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Written by Hu Qi Feng

Pediatrics

47sec

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How to relieve itching from baby rash?

Roseola infantum is caused by human herpesvirus infection, primarily characterized by high fever for three to five days. After the fever subsides, a rash appears. The rash, consisting of small, dense red maculopapules, is primarily located on the trunk and face, with fewer occurrences on the limbs. The entire rash appears in one day and gradually fades the following day. The rash does not cause itching, so there is generally no need for special anti-itch medications. The rash usually fades gradually the day after it appears and leaves no scars once it has cleared. The appearance of the rash after the fever subsides indicates that the herpesvirus infection is nearing recovery, requiring no special treatment.

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Written by Li Jiao Yan

Neonatology

56sec

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How long does vomiting last in children with sudden rash?

Roseola in infants is a common febrile rash disease in toddlers, generally caused by a viral infection. The primary clinical manifestations of roseola include high fever lasting 3-5 days. Typically, rash develops as the fever subsides or after the fever has resolved. Some children may also experience other symptoms, such as coughing, nasal congestion, runny nose, and sometimes vomiting or diarrhea. Roseola is generally a self-limiting disease; the rash and other symptoms usually disappear gradually after the fever resolves. However, if roseola is accompanied by other viral or bacterial infections, the duration of the illness or symptoms may be prolonged. Since each child is different, the duration of symptoms like vomiting in roseola varies from one child to another, and there is no specific timeframe.

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Written by Yao Li Qin

Pediatrics

1min 12sec

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How to treat roseola infantum?

Pediatric acute rash is a common febrile rash disease seen in infants and young children, mostly occurring between six months to one and a half years old. Its main symptom is a fever for three days followed by a rash as the fever subsides. Before the rash appears, it is not known to be pediatric acute rash. The treatment mainly involves symptomatic management, as it is caused by a viral infection, so some antiviral medications can be taken. Symptomatic treatment primarily involves reducing fever. The principle for fever reduction is that if the body temperature exceeds 38.5 degrees Celsius, give the child fever-reducing medication, such as ibuprofen suspension; below 38.5, physical cooling methods are sufficient. Once the fever has lasted three days and the rash appears confirming pediatric acute rash, all medications can be discontinued. The child should drink plenty of water and rest. Generally, the rash will fully develop within about 24 hours, and then naturally subside over the following three to five days.