Chickenpox in children: a case-based approach

The presentation

A 4-year-old we will call "Amara" (an illustrative example) is brought to the pharmacy by her mother. For two days she has been off her food and a little feverish, and this morning a rash of small, red, intensely itchy spots appeared, first on her chest and back and now spreading to her face and limbs. Some spots have already turned into tiny fluid-filled blisters. She is otherwise alert, drinking, and playing between grumbles. This is the classic picture of chickenpox: a widespread itchy rash that comes in crops, so at any one time you see spots, blisters and scabs together. The pharmacist recognises the pattern and focuses on comfort and safety-netting rather than tests.

How chickenpox behaves

Chickenpox usually starts with a mild fever and feeling unwell, followed by the rash. Spots appear over three to five days, blister, then crust over and scab. It is very infectious: it spreads through coughs, sneezes and contact with the blisters, and a child is contagious from about two days before the rash until every blister has crusted over — usually around five days after the rash starts. That is why the NHS advises keeping children off nursery or school until all the spots have scabbed. Most healthy children recover fully within one to two weeks. Once you have had chickenpox the virus stays dormant in the body and can, years later, reactivate as shingles.

Self-care and pharmacy advice

For a healthy, well child the aim is comfort while the illness runs its course. The pharmacist advises plenty of fluids to prevent dehydration, dressing in loose cool clothing, and keeping fingernails short (and using cotton mittens for babies) to reduce scratching, which lowers the risk of scarring and skin infection. Cooling gels or lotions and a soothing bath can ease the itch, and an oral antihistamine may help some children — a pharmacist can advise which products are suitable. Paracetamol can be used for fever or discomfort. Ibuprofen is generally avoided in chickenpox because it has been linked to more serious skin infections. Aspirin must never be given to children.

When chickenpox is more serious

Chickenpox is usually mild in children but can be dangerous in certain people, and this changes the advice completely. Newborn babies, pregnant women, and anyone with a weakened immune system — for example due to chemotherapy, high-dose steroids or certain conditions — can become seriously unwell and need urgent specialist assessment, sometimes with antiviral treatment. Adults tend to get chickenpox more severely than children. If a pregnant woman, a newborn, or an immunocompromised person is exposed to or develops chickenpox, they should contact their GP, midwife or NHS 111 urgently rather than waiting. The virus can occasionally cause complications such as pneumonia, or a serious brain inflammation, which is why safety-netting matters.

Safety-netting and follow-up

The pharmacist gives Amara's mother clear instructions on what to watch for. She should seek advice from a GP or NHS 111 if Amara becomes drowsy or hard to wake, if the fever is high or lasts beyond a few days, if she stops drinking or has signs of dehydration, or if any spots become hot, swollen, spreading and painful, or ooze pus — signs the skin has become infected. Some conditions need faster action: difficulty breathing, a stiff neck, a rash that does not fade under a glass, repeated vomiting or a fit should be treated as an emergency. This is general education, not a diagnosis — if a child is struggling to breathe, unresponsive or having a seizure, call 999.