An itchy rash and fever can disrupt work and raise questions about who you may have exposed. Chickenpox is often associated with childhood, but adults can get it too. If you think you have it, contact a doctor promptly and tell the clinic before you arrive. [1][3][4]
When to get urgent medical help
Seek urgent medical help for breathing difficulty, confusion or difficulty waking. If you are pregnant or have a weakened immune system and have been exposed to chickenpox or shingles, contact your doctor promptly even if you have no rash yet. [2]
What can chickenpox look like in an adult?
Chickenpox is caused by varicella-zoster virus. New spots can appear while earlier ones are turning into fluid-filled blisters or scabs, so a rash can have several stages at once. Fever and feeling unwell may accompany it. [1][3]
Vaccinated people can still develop chickenpox, usually with milder or less typical symptoms. There may be fewer spots and few or no blisters. A mild-looking rash therefore does not settle whether you have chickenpox or whether you can pass it on. [1][4]
Which changes need medical attention?
Possible complications include a bacterial infection of the skin, pneumonia or encephalitis, which is inflammation of the brain. Pregnancy and immune suppression are important reasons for early medical advice. Tell the doctor about cancer treatment, a transplant or medicines that suppress the immune system, if relevant. [1][2]
Contact a doctor promptly if a blister or the surrounding skin becomes increasingly hot, painful or very red, or starts leaking pus. These changes may signal a bacterial skin infection. Breathing difficulty, confusion or difficulty waking should be assessed urgently rather than managed as routine itching. [2]
Should an adult ask about treatment early?
A doctor may consider antiviral treatment for an adult with chickenpox. Timing matters because treatment works best when started early, so do not wait for the rash to become widespread before asking. Tell the doctor when the first spots appeared and what medicines you take; do not use someone else’s prescription. [2]
If home care is appropriate, ask how to manage fever and itching. Drink enough fluid, rest and avoid scratching. Do not take ibuprofen for chickenpox unless a doctor tells you to; NHS guidance warns of a risk of serious skin infection. Check suitable medicines with your doctor or pharmacist. [1][3]
When can you return to work, and who should you avoid?
Chickenpox can spread before the rash appears. Stay away from work while infectious and avoid contact with pregnant people, newborns and people with weakened immunity. For the usual blistering rash, remain off work until all the spots have crusted; if your rash does not blister, ask the clinician how to judge when it is safe to return. [1][3][4]
Before visiting, tell the clinic that you may have chickenpox so it can advise you about attending safely. If you are pregnant or immunosuppressed and have only been exposed, seek advice now rather than waiting for symptoms; the doctor needs to assess your history and what follow-up may be appropriate. [2][3]
How is chickenpox different from shingles?
Chickenpox and shingles involve the same virus but are different illnesses. Shingles occurs when the virus reactivates later in life. A person without immunity can catch the virus from someone with shingles and develop chickenpox. The shingles guide below covers that separate illness. [1][4]