Can You Use Salicylic Acid on Blisters After Cryotherapy for Warts?

Can salicylic acid be applied to blisters after cryotherapy for viral warts?

Hello, doctor.
Yesterday, I had cryotherapy on my finger and developed a large blister.
I'm unsure whether I should apply salicylic acid (Duofilm, a small yellow liquid that looks like nail polish).
In the past, I was prescribed gentamicin first, and only after about three treatments would I use salicylic acid.
Usually, after three cryotherapy sessions, I wouldn't get blisters, so I don't have much experience with this.
This is my first time undergoing cryotherapy, and the doctor prescribed salicylic acid for me.
After showering, I noticed the large blister when I was about to apply it.
My previous understanding was that salicylic acid is used for exfoliation, and applying it to my finger would cause it to wrinkle or break the skin.
I remember the doctor always advised against popping blisters, fearing that it would lead to complications.
I'm hesitant about whether to apply salicylic acid or wait until the blister has healed.
Thank you, doctor!

Cao, 20~29 year old female. Ask Date: 2019/03/22

Dr. Wu Yuxin reply Dermatology

Wait for the wound to heal, then consult your attending physician.

Reply Date: 2019/03/22

More Info

After undergoing cryotherapy for warts, it is common to develop blisters as part of the healing process. These blisters are essentially a protective response from your body, designed to shield the underlying skin as it heals. When it comes to using salicylic acid (like Duofilm) on these blisters, caution is advised.

Salicylic acid is a keratolytic agent, meaning it works by softening and dissolving the outer layer of skin, which can be beneficial for treating warts and other skin conditions. However, applying salicylic acid directly to a blister can pose several risks. Firstly, blisters serve as a natural barrier to protect the underlying skin from infection and further irritation. Applying salicylic acid to an intact blister could potentially cause the blister to break, leading to pain, increased risk of infection, and delayed healing.

Given that this is your first experience with cryotherapy and the subsequent blistering, it is generally recommended to wait until the blister has resolved before applying salicylic acid. Allowing the blister to heal naturally will help ensure that the skin underneath is protected and can recover without additional irritation. Once the blister has dried up and the skin has healed, you can then consider using salicylic acid to help with any remaining wart tissue or to prevent new warts from forming.

If you are uncertain or if the blister appears to be worsening, it is always best to consult with your healthcare provider or dermatologist. They can provide personalized advice based on your specific situation and skin condition. In the meantime, keep the blister clean and covered with a sterile bandage to protect it from friction and potential infection.

In summary, avoid applying salicylic acid directly to the blister. Instead, let the blister heal naturally and resume the use of salicylic acid once the area is no longer blistered. This approach will help ensure a smoother recovery and minimize the risk of complications.

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