What should you know about first symptoms of chickenpox in adults?

Chickenpox is caused by varicella-zoster virus. Adults may feel unwell before the rash appears, with [Fever](/symptoms/fever/), headache, reduced appetite, or muscle aches. The rash often begins as itchy red spots, then progresses through raised bumps and [Skin Blisters](/symptoms/skin-blisters/) before crusting. New spots can appear while earlier ones are drying, so lesions may be at different stages at once.

Chickenpox can be confused with other blistering illnesses, including [Shingles](/conditions/shingles/), but shingles usually follows a band-like pattern on one side of the body. A clinician can assess the distribution, symptoms, exposure history, and medical risks.

Contact a clinician promptly for a [GP Consultation](/treatments/consultations-and-assessment/gp-consultation/), especially if you are pregnant, immunocompromised, or have significant chronic illness. Stay away from people who are pregnant, newborn, or immunocompromised until advised that you are no longer infectious. Do not scratch; keep nails short, use gentle skin care, and ask about [Antihistamine Treatment](/treatments/medical-dermatology/oral-antihistamine-therapy/) for itch. [Antiviral Treatment](/treatments/medical-dermatology/antiviral-therapy/) may be considered for some adults and works best when assessed early. Avoid aspirin unless a clinician specifically advises it.

Seek urgent medical help for breathing difficulty, confusion, severe headache, repeated vomiting, unusual drowsiness, dehydration, a rapidly worsening illness, or a rash involving the eyes. Get prompt advice for skin that becomes very painful, hot, swollen, or drains pus, or for persistent high fever. Adult chickenpox can be more severe than childhood illness, so early assessment matters.

Ask whether the rash fits chickenpox, when you became infectious, whether antiviral medicine is suitable, and how to control itch safely. Ask how long to avoid work or close contact, which warning signs require emergency care, and whether future [Chickenpox Vaccination](/treatments/preventive-care-and-vaccination/chickenpox-vaccination/) should be discussed after recovery.