varicella

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Written by Cui Lin Jing
Dermatology
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The difference between prickly heat and chickenpox

Prickly heat is a physical skin condition that often occurs in hot and humid summer weather, related to excessive sweating, especially common among infants, the elderly, and people working in high-temperature environments. It appears in three types: white, pustular, and red prickly heat. Generally, prickly heat does not have systemic symptoms; it does not feature fever and is not contagious. Chickenpox, on the other hand, is a common acute infectious skin disease, mainly characterized by scattered erythema and vesicles on the trunk, face, and proximal limbs. It is contagious and has prodromal symptoms such as fever, fatigue, and muscle soreness.

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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 Yuan Lin Yan
Infectious Disease
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What is chickenpox?

Chickenpox is a contagious disease caused by the varicella-zoster virus, commonly seen in children and prevalent in the spring season. The only source of infection is individuals with chickenpox. It spreads through respiratory droplets and direct contact. The disease is highly contagious and the general population is susceptible, but once recovered, long-lasting immunity is acquired. Clinically, symptoms may include mild fever, headache, fatigue, sore throat, cough, and loss of appetite, lasting for one to two days before the appearance of a rash. The rash first appears on the trunk and then spreads to the face and limbs. Chickenpox rash usually appears in batches, so at the same site, maculopapular rash, vesicles, and crusts can be seen. The crusts typically fall off about a week later, generally leaving no scars. Chickenpox is a self-limiting disease and typically resolves on its own in about ten days.

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Written by Liu Gang
Dermatology
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Is papular urticaria chickenpox?

Chickenpox is caused by an infection with the varicella-zoster virus and is contagious. It is common among children, though some adults may also contract chickenpox. Once it appears, it is highly contagious and needs to be treated with antiviral medication. Papular urticaria is caused by allergies, often related to mosquito or flea bites. Standard antiallergic medication is typically sufficient for treatment. Occasionally, papular urticaria can present with small blisters similar to those seen in chickenpox, but they are different diseases. If it is difficult to distinguish between them, it is advisable to visit a dermatologist at a formal hospital for diagnosis and treatment.

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Written by Yu Gang
Dermatology Department
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Is herpes zoster the same as chickenpox?

Herpes zoster is caused by the varicella-zoster virus. Typically, this virus causes chickenpox in children, but in adults, it manifests as herpes zoster, which is unrelated to chickenpox. The herpes zoster virus primarily attacks the nerves, causing neuralgia. Therefore, it is generally recommended to rest, consume a light diet, and avoid spicy foods, seafood, and rich foods. Treatment usually involves the use of acyclovir and valacyclovir for topical application. Oral nutritional supplements for the nerves, such as vitamin B1 and B12, and spleen peptides to enhance the body's immunity, are also recommended. It is important to rest and pay attention to these aspects. It is best to visit a local dermatologist for a proper diagnosis.