Patient question guide · Published 2026-10-31

When do redness, swelling, pus or fever after wart treatment suggest infection?

A small blister or crust can follow wart treatment, but increasing pain, spreading redness, pus or other discharge, fever or feeling generally unwell can signal infection. Do not wait for the next scheduled wart session; contact the treating clinician or local medical service. Do not start leftover antibiotics or ointments without advice.

“The area is redder, more swollen and weeping after cryotherapy. Can I wait until my next treatment?”

The direction of change matters more than one expected reaction

Blistering or crusting may follow cryotherapy. NHS guidance lists increasing pain, swelling and redness, feeling unwell, wound discharge, or pain worsening after 48 hours as reasons to check for infection. MedlinePlus lists red streaking, pus, discharge and fever.

[1] University Hospitals Sussex NHS Foundation Trust. Cryotherapy [2] Leeds Teaching Hospitals NHS Trust. Cryotherapy [3] MedlinePlus Medical Encyclopedia. Warts

Record what a clinician needs today

Note treatment date and method, whether redness is spreading, pain trend, discharge colour or smell, temperature, chills or malaise, diabetes, immune suppression and medicines. Follow the original dressing and washing instructions. Do not squeeze the site or remove crust before assessment.

Treatment date, method and site
Timed change in the border of redness
Pain score and worsening time
Discharge colour, smell and amount
Temperature, chills and malaise
Diabetes, immune suppression and medicines

[1] University Hospitals Sussex NHS Foundation Trust. Cryotherapy [2] Leeds Teaching Hospitals NHS Trust. Cryotherapy [3] MedlinePlus Medical Encyclopedia. Warts

Bomyung does not relabel suspected infection as a treatment reaction

Near Gangnam Station, Seok-Yong Jo, doctor of Korean medicine, draws on 24 years of wart-care experience to review previous treatment with the current lesion and plan individual Korean medicine care. Spreading redness, pus or fever needs appropriate wound or infection assessment first. Bomyunghwan, Bomyungtang or immune pharmacopuncture are not automatically used and are not presented as substitutes for infection treatment.

[1] University Hospitals Sussex NHS Foundation Trust. Cryotherapy [2] Leeds Teaching Hospitals NHS Trust. Cryotherapy

Questions before your visit

Does a blister alone mean infection?

No. A blister can be expected; look for spreading redness, pus, increasing pain or fever.

Can I wait for the next appointment?

Not when warning signs are present; contact the treating clinician or local service.

Can I use leftover antibiotic ointment?

Do not start it on your own; ask a clinician or pharmacist about the wound and product.

Sources and limits

NHS and MedlinePlus guidance identifies post-cryotherapy infection warning signs. Online information cannot confirm or exclude infection; local clinicians determine urgency.