Understanding the Causes of Keloid-Prone Skin and Its Difference from Hypertrophic Scars | Yonsei Star Dermatology Sinchon
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Understanding the Causes of Keloid-Prone Skin and Its Difference from Hypertrophic Scars | Yonsei Star Dermatology Sinchon

If a small wound keeps getting bigger, you might have keloid-prone skin. We've made it easy to understand how it differs from hypertrophic scars and why early treatment is important.

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If you've experienced a small wound or scar becoming harder and larger over time, you might suspect keloid-prone skin. The first question that usually comes to mind is: "Why do my scars get so big, unlike others?" You can understand keloids as a constitutional characteristic where connective tissue grows excessively during the wound healing process.

What is Keloid-Prone Skin?

Medically, when the cause is difficult to clearly identify, it is often described as genetic or constitutional. Keloids also fall into this category, so you can understand them as scars that develop constitutionally. The difference in how some people heal without a trace from a wound of the same depth, while others develop large, raised scars, stems from this.

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As the term "constitutional" implies, keloids are deeply related to an inherited skin tendency. Therefore, the response to the same stimulus can vary from person to person.

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Can I know in advance if I have keloid-prone skin?

Unfortunately, it is difficult to confirm keloid-prone skin before a scar forms. Most people only realize they have "keloid skin" after a wound occurs, or after directly experiencing a scar gradually growing larger.

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In the clinic, many people first visit because a piercing site or a small surgical scar has swollen. Therefore, once you know you are keloid-prone, you have no choice but to be careful about stimuli applied to your skin from then on.

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Here are some points to keep in mind once you know your skin type:

  • Carefully decide on new piercings or non-essential procedures.
  • When a wound occurs, manage it cleanly without scratching or irritating it.
  • If you notice changes such as the scar becoming hard or growing, seek early treatment.
  • Do not squeeze or irritate scars based on self-diagnosis.

How do keloids and hypertrophic scars differ?

Strictly speaking, keloid scars and hypertrophic scars are completely different types of scars. However, their appearance is similar, and there are overlapping aspects, so in clinical practice, the two terms are sometimes used interchangeably.

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Some doctors may call the same scar a keloid, while others refer to it as a hypertrophic scar. This shows how difficult it is to distinguish them based on appearance alone.

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Nevertheless, if we pinpoint the key difference, keloid skin scars are the more severe of the two.

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ClassificationKeloid ScarHypertrophic Scar
Time CourseGradually worsens and grows largerMay gradually appear less severe over 6 months to 1 year
ExtentTends to spread beyond the original wound boundariesGenerally stays within the wound boundaries
ManifestationClassified as a more severe formRelatively less severe form

A keloid scar gradually worsens and grows larger over time, while a hypertrophic scar may naturally subside after a certain period.

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If you are unsure which type your scar is, it is safer to confirm through a consultation rather than trying to judge the changes yourself.

For questions, inquire via chat consultation about keloid scar treatment

Why is early treatment important?

If you have keloid-prone skin, it is important to manage scars early before they grow larger. Once a scar becomes firm and large, it becomes more difficult to treat. For the same reason, if you know you are keloid-prone, we recommend seeking treatment early after a scar forms.

Treatment directions may vary depending on the scar's condition, location, and your constitution. Triamcinolone Scar Injection to flatten raised scars may be considered, and Surgical Scar Revision may also be reviewed depending on the scar's shape. The appropriate method will be determined after directly examining the scar.

Signs to watch for before a scar settles

If you observe the following changes, it is advisable not to delay scar treatment:

  • If the scar continues to harden or grow larger even after the wound has healed.
  • If the scar appears to spread beyond the original wound boundaries.
  • If itching or stinging discomfort persists.
  • If you have experienced the scar repeatedly swelling in the same area.

These signs can easily be confused with general cosmetic surgery scars or surgical scars, so a diagnosis through consultation is more helpful than self-assessment.

If you are concerned about changes in your scar now, you can comfortably inquire about your current condition via chat consultation.

Today, we looked at the causes of keloid-prone skin and the differences from similar-looking hypertrophic scars. Since early management of keloids is advantageous in reducing scar growth, we recommend seeking treatment as soon as possible if you know you are keloid-prone. Thank you for reading.

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Chief Director Dr. Sang-Joo Lee (MD, PhD, Yonsei University College of Medicine and Graduate School, Completed Dermatology Residency at Severance Hospital, President of the Korean Dermatological Association) Chief Director Dr. Sang-Joo Lee's Profile First published 2024-10-28 / Last reviewed 2026-06-16

This content is for general information purposes only, and as scar patterns and responses can vary individually, please consult with medical staff for an accurate diagnosis and treatment plan.

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A 1:1 consultation is the most accurate way to confirm whether the treatment fits you.