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Kids' corner · Comic No 4

Clara and the nitrogen treatment

A reassuring comic to help children understand how a wart is treated with cold. The comic pages are in French; the full text is available in English below.

  • 2 pages
  • To read together
  • Cryotherapy
Clara, the clinic’s virtual assistant
Page 1 Discovering the care, gently
Comic “Clara and the nitrogen treatment”, page 1 (in French): Clara welcomes a little boy and his mother, asks a few questions, explains what a wart is and how very cold nitrogen helps the body get rid of it, looks at the area and explains the care before starting. The full text is available in English below the comic. Enlarge page 1
Page 2 The care and going home
Comic “Clara and the nitrogen treatment”, page 2 (in French): the little boy gets settled, Clara applies very cold nitrogen for a few seconds while checking that he is comfortable, explains that the area may turn red or form a small blister, shows what to watch for at home and congratulates him as he leaves. The full text is available in English below the comic. Enlarge page 2
Page 1 of 2

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Read the comic text in English

Page 1 — Discovering the care, gently

  1. 1. Welcome!

    • On the poster: “Welcome to our clinic!”
    • Clara: “Hello! I'm Clara. We're going to look at your little bump and I'll explain the care.”
    • The mother: “Thank you, he was a little worried.”
    • The child: “Okay!”
  2. 2. Let's chat a little

    • Clara: “Does the area hurt? Have you ever had this care before?”
    • The child: “No… I just want it to go away.”
    • On the poster: “Little care for big victories!”
    • Key point: Clara first checks whether the care is appropriate.
  3. 3. What is a wart?

    • Clara: “Nitrogen is used to freeze the wart to help the body get rid of it.”
    • The drawing shows three steps: a little bump on the skin (wart), we freeze it with very cold nitrogen, then the body gradually gets rid of it over time.
    • Key point: sometimes more than one treatment may be needed.
  4. 4. Looking at the area

    • Clara: “I'm looking at the area before we start.”
    • The child: “I'm okay.”
    • Clara: “I'll explain every step, and we'll stop if you're too uncomfortable.”
  5. 5. The care is possible

    • Clara: “The care may sting a little and feel very cold, but it's quick.”
    • Key point: the treatment is done gently and stops if the child is too uncomfortable.
    • Key point: a consultation is used to check whether the treatment is appropriate.
  6. 6. Ready for what's next?

    • Clara: “I'll stay gentle and tell you what I'm doing.”
    • The child: “I'm ready!”
    • A little star: “Mission bye-bye wart!”

“A reassuring comic to help children understand their care.”

Page 2 — The care and going home

  1. 1. Getting settled

    • Clara: “I'm getting you nice and comfy so it's easier.”
    • The child: “Like a real brave kid!”
    • A little star: “Ready for the mission!”
  2. 2. The treatment begins

    • Clara: “We apply the very cold nitrogen for a few seconds.”
    • The child: “It's cold… but it's okay!”
    • Key point: the care is done gently.
  3. 3. Checking that you're comfortable

    • Clara: “If it's too uncomfortable, you tell me, okay?”
    • The child: “Okay!”
    • The mother: “You're very brave.”
  4. 4. All done!

    • Clara: “Well done! The treatment is finished.”
    • The child: “Already?”
    • Key point: after the care, the area may turn red, feel sensitive or form a small blister.
  5. 5. At home

    • Clara: “At home, watch especially for significant pain or anything that worries you.”
    • Watch for: mild redness, sensitivity, small blister.
    • Contact the clinic if there is significant pain or any concern.
  6. 6. Time to go

    • Clara: “Well done! You were brave.”
    • The mother: “Thank you!”
    • The child: “Goodbye, Clara!”
    • The child holds a card that says “Super brave!”
    • On the poster: “Little steps make big victories!”

“Understanding the care often helps children feel more confident.”

For parents: good to know

  • A consultation with a nurse practitioner (NP) is required before a liquid nitrogen treatment, unless you have a valid prescription from an authorized professional. The NP checks that the lesion can be treated this way.
  • During the application, a burning sensation is usual. Afterwards, redness, swelling or a blister may appear, and several sessions are sometimes needed.
  • Contact the clinic if, after 48 hours, the treated area becomes increasingly red, swollen or painful, or if fluid drains from it after 24 hours.

All about liquid nitrogen cryotherapy

Psst… a little secret from Clara

In the comics, Clara puts on her scrubs to tell the story of the care. In real life, Clara is the website's virtual assistant: the clinic's nurses and health professionals are the ones who provide care. Clara is here to guide you around the website!

Clara's comics are intended to inform children and their parents. They do not replace a consultation or an assessment by a health professional. In an emergency, call 911. For health advice, call Info-Santé 811. Page published on October 16, 2026.