How to determine if it is chickenpox

Written by Liu Gang
Dermatology
Updated on May 09, 2025
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Chickenpox is caused by an infection with the varicella-zoster virus and is highly contagious, spreading through contact with one another. Generally, the initial symptoms of chickenpox appear as small blisters on the body, which tend to increase in number within a day or two. Some blisters may burst or erode, particularly on the scalp, and are often accompanied by feverish symptoms. The natural course of the disease is about a week, and mild cases can recover spontaneously within a week. It is recommended that if diagnosed with chickenpox, antiviral medication should be administered and isolation should be practiced to avoid contact with children or older adults with weakened immune systems. Generally, treatment for about a week can lead to recovery.

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Written by Huang Kun Mei
Pediatrics
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Early symptoms of chickenpox

The early symptoms of chickenpox generally include fever, and the rash appears as red papules. Later, it can lead to the development of vesicles. In the initial stage of chickenpox, some precautions need to be taken for children, such as avoiding exposure to wind, keeping children away from crowded places, and ensuring a light and easily digestible diet with plenty of fresh vegetables and fruits, such as broccoli, tomatoes, bitter melon, etc. Regarding care, the room should be ventilated for two hours every day to ensure fresh air. Since chickenpox is caused by a viral infection, some antiviral traditional Chinese medicines can be administered to the child for treatment.

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Written by Yuan Lin Yan
Infectious Disease
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What are the symptoms and treatments for chickenpox in children?

Symptoms of chickenpox in children vary with age. Infants often show no symptoms or only mild symptoms, which can include mild fever, irritability, and refusal of breast milk, accompanied by a rash. Older children may experience mild fever, headache, fatigue, sore throat, coughing, and decreased appetite. These symptoms persist for one to two days before a rash appears. The rash initially appears on the trunk and then spreads to the face and limbs. Chickenpox rashes often emerge in batches, so the same area may show maculopapular lesions, vesicles, and crusts at the same time. The crusts typically fall off about a week later, usually leaving no scars. Secondary bacterial skin infection, pneumonia, encephalitis, and hepatitis are possible complications. In terms of treatment, infected children should be isolated until all the vesicles have crusted over. During the fever, they should rest in bed, consume an easily digestible diet, stay hydrated, and practice enhanced skincare to prevent infection of the vesicles. Antiviral treatment within 24 hours of rash onset can control the progression of the rash and speed up recovery. If a secondary bacterial infection develops, antibiotics should be used. In cases where encephalitis causes cerebral edema, dehydration treatments should be administered. The use of corticosteroids is not advisable for treating chickenpox.

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Written by Han Jian Hua
Infectious Disease
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When to get the chickenpox vaccine?

Chickenpox primarily affects infants and children, and the target group for chickenpox vaccination is mainly 1-12 years old. During this age period, most children enter preschool or elementary school institutions, and the chickenpox virus is highly contagious, transmittable through droplets and contact. Once one child contracts chickenpox, the surrounding children are almost certain to be infected too. Additionally, since there are currently no effective medications to cure chickenpox, it is best to vaccinate within this age range, namely 1-12 years old. Adults can receive the chickenpox vaccine without age restrictions. The timing can be decided based on individual circumstances, but it is generally recommended to get vaccinated before the onset of the peak season for chickenpox, which is best before the spring and winter seasons.

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Written by Liu Gang
Dermatology
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Symptoms and Treatment of Chickenpox

Chickenpox is primarily caused by an infection with the varicella-zoster virus, and the disease is generally transmitted through the respiratory tract. At the onset of the disease, red papules appear on the body, face, or scalp, which gradually develop into small vesicles. As the vesicles grow, they feel itchy. Scratching them can break the vesicles, leading to oozing and crusting. As the condition progresses, it can peak within two to three days, presenting with widespread vesicles throughout the body. In such cases, antiviral treatment should be promptly administered, such as acyclovir tablets or valacyclovir dispersible tablets. These can be combined with traditional Chinese antiviral medications, such as Scutellaria root oral solution.

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Written by Huang Kun Mei
Pediatrics
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Will new chickenpox blisters appear if medication is used after two days?

Medication may still cause new outbreaks of chickenpox two days after its initial use, as the typical duration of chickenpox is about a week, and new outbreaks can still occur. In this situation, it is important to avoid scratching because scratching can easily lead to skin infections and worsen the condition. Therefore, it is vital to avoid scratching. If the itching is severe, a calamine lotion can be applied to the skin. Additionally, it is crucial to consume a light, easily digestible diet, including fresh vegetables and fruits, such as broccoli, kiwi, apples, etc., and timely antiviral treatment should be carried out, as chickenpox is caused by a viral infection. (Use of medication should be under the guidance of a physician.)