Raised Scars: What Are Keloid and Hypertrophic Scars?
Author: Alexander Gaudet, Editor: Srinethe Sukesh
Many people worldwide have, or know someone who has, raised scars. These scars can range from minor marks collected over the years to more prominent ones that might warrant medical attention. But what exactly are raised scars, and how do they form? To understand this, we need to explore the different types of raised scars, much like we consider the various types of scars in general. Raised scars develop based on several factors, including skin tone and the depth of the original wound. The two most commonly classified types of raised scars are hypertrophic scars and keloids.
Hypertrophic scars are characterized by a raised "bump" that varies in color, often appearing as a light peach hue, although this can differ based on an individual's skin tone. These scars are typically linear and mature over time, gradually fading. The original injury's depth influences the scar's thickness and width. Generally, hypertrophic scars are non-threatening and can be removed for cosmetic reasons.
(See Top Right) Hypertrophic scar example - Photo by Alexander G.
In contrast, keloid scars primarily develop due to hereditary factors. Like hypertrophic scars, keloids are raised and form a "bump," but they often have a darker and more rigid surface. Keloid scars are more common among people of color or those with darker skin tones. Unlike hypertrophic scars, keloids can persist indefinitely and may continue to grow, sometimes developing into larger tumor-like formations that require surgical removal.
(See Bottom Right) Keloid scar example - Photo by Jobskin
Works Cited
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Jaliman, Debra. “Scar Treatments: Types of Scars and Their Treatments.” WebMD, 10 August 2021, https://www.webmd.com/beauty/cosmetic-procedures-scars. Accessed 19 June 2024.
“Keloid scar - Symptoms and causes.” Mayo Clinic, 13 July 2023, https://www.mayoclinic.org/diseases-conditions/keloid-scar/symptoms-causes/syc-20520901. Accessed 19 June 2024.
Sherris, DA. “Scar contractures, hypertrophic scars, and keloids.” PubMed, https://pubmed.ncbi.nlm.nih.gov/11735059/. Accessed 19 June 2024.
“Understanding Keloid Scars.” Jobskin, 21 February 2022, https://www.jobskin.co.uk/understanding-keloid-scars. Accessed 19 June 2024.