AI Summary Overview
Chickenpox Symptoms That Should Not Be Ignored
The table below highlights chickenpox symptoms that may indicate a complication and explains why they should not be ignored:
| Symptom or Change | What It May Indicate |
| Skin around the blisters becomes increasingly red, hot, swollen or painful | A bacterial skin or soft-tissue infection |
| Shortness of breath or worsening breathing | Possible chickenpox pneumonia |
| Severe headache with confusion or unusual drowsiness | Possible encephalitis or other neurological involvement |
| New difficulty with balance or coordination | Possible cerebellar ataxia |
| Unusual bleeding associated with the rash | A bleeding complication |
| Signs of dehydration, such as reduced urination | Significant fluid loss requiring assessment |
| Rapid worsening of the illness or overall condition | A serious infection or other complication |
These symptoms do not confirm a complication of chickenpox on their own, but they warrant medical assessment. Recognised complications of chickenpox include bacterial skin infection, pneumonia, encephalitis, cerebellar ataxia, sepsis, dehydration and bleeding complications.
Why Do Chickenpox Symptoms Occur?
Chickenpox develops after infection with the varicella-zoster virus (VZV). The body's immune response to the virus can cause fever, tiredness, aches, headache and loss of appetite around the time the rash appears.
The characteristic chickenpox rash develops in stages. Small spots appear first and may become raised before developing into fluid-filled blisters. The blisters then dry and form scabs. New lesions can continue to appear while older ones are already blistering or crusting, which means several stages of the rash may be visible at the same time.
The rash can occur on the chest, back, face and other areas of the body. Lesions can also develop inside the mouth and around the genital area, where they may be painful. The itching is associated with the skin inflammation caused by the infection and the body's response to it.
Chickenpox Symptoms That Require Immediate Medical Attention
Some chickenpox symptoms may indicate complications involving the lungs, nervous system, skin or bloodstream. Prompt medical assessment is important when symptoms become severe or change significantly.
You should seek urgent medical help for:
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Difficulty breathing or increasing shortness of breath
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Severe headache with confusion, unusual drowsiness or altered consciousness
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New problems with balance or coordination
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Rapidly worsening redness, swelling, heat or pain around the blisters
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Significant or unusual bleeding associated with the rash
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Signs of severe dehydration
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Rapid or significant deterioration in overall condition
Pregnant women, newborn babies and people with a weakened immune system have a higher risk of contracting chickenpox and its complications. They should seek medical advice promptly if they develop chickenpox symptoms or have been exposed to the infection.
Symptoms of Chickenpox in Children
Children may first show an itchy rash when they develop chickenpox. Although, fever, tiredness, aches or loss of appetite can occur before or around the same time. The rash develops in stages, with new spots appearing while earlier lesions become blisters or scabs.
Parents may notice the following chickenpox symptoms in children:
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Itchy spots appearing in batches
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Spots becoming raised and developing into fluid-filled blisters
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Older blisters drying and forming scabs
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New lesions appearing while older ones are healing
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Spots inside the mouth or around the genital area, which may be painful
The main difference in children compared to adults is often how chickenpox is first noticed, rather than a completely different set of symptoms. In many children, the rash is the first noticeable sign of the infection.
Can You Have Chickenpox Without Symptoms?
Chickenpox usually causes a noticeable rash, but infection can be much milder in people who develop breakthrough chickenpox after vaccination.
Breakthrough chickenpox may cause fewer than 50 lesions, little or no fever and few or no obvious blisters. The rash may instead consist mainly of flat or raised spots, making the infection harder to recognise than typical chickenpox.
Therefore, breakthrough chickenpox is better described as mild or less recognisable rather than routinely symptom-free. A person with breakthrough chickenpox can still spread the infection.
When Can Chickenpox Symptoms Become Life-Threatening?
Chickenpox can become life-threatening when complications affect the lungs, nervous system, skin or bloodstream. Although serious complications are uncommon, they can require urgent medical care.
The table below explains the main chickenpox complications and the warning patterns that may occur with them:
| Complication | Possible Warning Pattern |
| Pneumonia | Shortness of breath or worsening breathing |
| Encephalitis | Severe headache, confusion, unusual drowsiness or altered consciousness |
| Cerebellar ataxia | New problems with balance or coordination |
| Severe bacterial infection or sepsis | Rapid deterioration with increasingly red, hot, swollen or painful skin |
| Bleeding complications | Unusual bleeding associated with the rash |
| Severe dehydration | Reduced urination or other signs of significant fluid loss |
Infants, adolescents, adults, pregnant women and those with weakened immune systems have a higher risk of developing serious chickenpox and its complications.
How are Chickenpox Symptoms Diagnosed?
Chickenpox can often be recognised from the characteristic rash and its progression. Laboratory testing is not always needed, but it can help confirm the infection when the rash is unusual or the diagnosis is uncertain.
The table below explains the main assessments and tests used when evaluating suspected chickenpox:
| Assessment or Test | Purpose |
| Skin examination | Assesses the characteristic spots, blisters and scabs |
| Symptom history | Establishes how the rash and other symptoms developed |
| Exposure history | Identifies possible recent contact with chickenpox or shingles |
| VZV PCR testing | Confirms varicella-zoster virus infection when laboratory confirmation is needed |
| Additional investigations | Assess suspected complications such as pneumonia or neurological involvement |
PCR testing of skin lesions, particularly scabs or fluid from blisters, is the preferred laboratory method for confirming chickenpox. In breakthrough chickenpox, PCR can be particularly useful because the rash may contain few or no obvious blisters.
FAQs
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Q1. What is the first symptom of chickenpox?
Ans: Chickenpox is often first noticed as an itchy rash, particularly in children. Fever, tiredness, aches, loss of appetite or headache can occur before or around the time the rash appears. -
Q2. Why are chickenpox spots at different stages?
Ans: Chickenpox spots appear in batches rather than all at once. As a result, new spots, fluid-filled blisters and scabs can be present on the skin at the same time. -
Q3. Can chickenpox spots appear inside the mouth?
Ans: Yes. Chickenpox lesions can develop inside the mouth and may be painful rather than itchy.
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References
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https://www.cdc.gov/chickenpox/signs-symptoms/index.html
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