Keloid Scars: Causes, Symptoms, and Treatment
What is Keloid Scars?
A keloid scar is a type of raised scar that occurs when the skin heals after an injury. Unlike normal scars, which tend to fade over time, keloids grow beyond the boundaries of the original wound and do not regress. They are benign (non-cancerous) but can be itchy, painful, or cosmetically concerning. Keloids are more common in people with darker skin tones and can develop anywhere on the body, though they often appear on the chest, shoulders, earlobes, and cheeks.
According to the Mayo Clinic, keloids form due to an overproduction of collagen, a protein that helps repair skin damage. While the exact cause is unknown, genetics and skin tension play significant roles in their development.
Common Causes
Keloid scars can form after various types of skin injuries. Here are some common causes:
- Acne or chickenpox scars – Inflammatory skin conditions can lead to keloids, especially if the skin is picked or scratched.
- Piercings – Earlobe or body piercings are common triggers for keloid formation.
- Surgical incisions – Cuts from surgeries, including cesarean sections, can develop into keloids.
- Burns – Thermal, chemical, or friction burns may result in keloid scars.
- Vaccination sites – Some people develop keloids at the site of childhood vaccinations.
- Trauma or cuts – Even minor scratches or scrapes can lead to keloids in susceptible individuals.
- Insect bites – Bites that cause significant inflammation may trigger keloid formation.
- Tattoos – The needle punctures from tattoos can sometimes result in keloids.
- Infections – Skin infections, such as folliculitis, can lead to keloid scars.
- Genetic predisposition – A family history of keloids increases the likelihood of developing them.
Keloids are more likely to form in areas of the body with high skin tension, such as the chest, shoulders, and upper back.
Associated Symptoms
Keloid scars can present with several symptoms, including:
- Raised, thickened skin – Keloids are typically firm and rubbery to the touch.
- Shiny, smooth surface – They often have a glossy appearance.
- Itching or tenderness – Some keloids may be itchy or painful, especially during growth.
- Red, pink, or darker than surrounding skin – The color can vary depending on skin tone and the age of the keloid.
- Gradual growth – Keloids can continue to grow slowly over months or years.
- Discomfort or restricted movement – If located near a joint, a keloid may limit mobility.
Unlike hypertrophic scars, which stay within the boundaries of the original wound, keloids extend beyond the injury site.
When to See a Doctor
While keloids are not medically dangerous, you should consult a healthcare provider if:
- The scar is growing rapidly or becoming increasingly painful.
- The keloid is located in an area that affects movement or function (e.g., near a joint).
- You experience signs of infection, such as increased redness, warmth, or pus.
- The scar is causing significant emotional distress or affecting your self-esteem.
- You want to explore treatment options for cosmetic reasons.
A dermatologist or plastic surgeon can evaluate the keloid and recommend appropriate treatments.
Diagnosis
Diagnosing a keloid scar typically involves a physical examination by a healthcare provider. In most cases, no additional testing is needed. However, if the diagnosis is unclear, a doctor may perform:
- Biopsy – A small sample of the scar tissue is removed and examined under a microscope to rule out other conditions, such as skin cancer.
- Medical history review – The doctor may ask about past injuries, surgeries, or family history of keloids.
Keloids are usually easy to distinguish from other types of scars due to their raised, expansive nature.
Treatment Options
Treating keloid scars can be challenging, and no single method works for everyone. Treatment aims to reduce the size, relieve symptoms, and improve appearance. Options include:
Medical Treatments
- Corticosteroid injections – These are the most common treatment for keloids. Injections of steroids (e.g., triamcinolone) can help flatten the scar by reducing inflammation and collagen production. Multiple sessions may be needed.
- Surgical removal – A doctor may cut out the keloid, but there is a high risk of recurrence. Surgery is often combined with other treatments, such as steroid injections or radiation, to reduce the chance of the keloid returning.
- Laser therapy – Lasers can help reduce redness and flatten the scar. This method is often used in combination with other treatments.
- Cryotherapy – Freezing the keloid with liquid nitrogen can help reduce its size. This method is usually used for smaller keloids.
- Radiation therapy – Low-dose radiation can be used after surgical removal to prevent recurrence. This is typically reserved for severe cases.
- Pressure therapy – Applying pressure with silicone gel sheets or dressings can help flatten keloids, especially after surgery.
- Immunotherapy – Medications like interferon or 5-fluorouracil (5-FU) may be injected to reduce scar tissue.
Home and Alternative Treatments
- Silicone gel or sheets – Over-the-counter silicone products can help soften and flatten keloids when used consistently.
- Onion extract gels – Some studies suggest that onion extract may help reduce scar size and redness, though results vary.
- Massage – Gently massaging the scar with moisturizing oils (e.g., coconut or vitamin E oil) may improve flexibility and reduce itching, though it won’t eliminate the keloid.
- Aloe vera – Applying aloe vera gel may soothe itching and inflammation, but it is not a cure.
It’s important to note that home remedies are generally less effective than medical treatments and may not work for everyone. Always consult a healthcare provider before trying new treatments.
Prevention Tips
Preventing keloid scars can be difficult, especially if you are genetically predisposed. However, the following tips may help reduce your risk:
- Avoid unnecessary piercings or tattoos – If you have a history of keloids, consider avoiding elective skin procedures.
- Treat wounds promptly – Clean and cover cuts, scrapes, or burns to minimize inflammation and reduce the risk of keloid formation.
- Avoid picking at scabs or acne – Picking can increase inflammation and the likelihood of scarring.
- Use pressure or silicone sheets after surgery – If you’ve had surgery, ask your doctor about using pressure dressings or silicone sheets to prevent keloids.
- Consider steroid injections for high-risk areas – If you’re undergoing surgery in a keloid-prone area (e.g., chest), discuss preventive steroid injections with your doctor.
- Protect your skin from injury – Wear protective gear during activities that could cause cuts or burns.
If you know you’re prone to keloids, inform your healthcare provider before any surgical procedures so they can take preventive measures.
Emergency Warning Signs
While keloids themselves are not emergencies, you should seek immediate medical attention if you experience any of the following:
- Signs of infection – Increased pain, redness, swelling, warmth, or pus around the keloid. This could indicate a bacterial infection requiring antibiotics.
- Rapid growth or changes in appearance – If the keloid suddenly grows larger or changes color, it should be evaluated by a doctor to rule out other conditions.
- Severe pain or bleeding – Unusual pain or bleeding from the keloid may indicate an underlying issue.
- Ulceration or open sores – If the keloid develops open wounds or sores, it may require medical treatment to prevent infection.
If you experience any of these symptoms, contact your healthcare provider or visit an urgent care center promptly.
Conclusion
Keloid scars are a common but challenging skin condition that can cause both physical and emotional discomfort. While they are not harmful, their appearance and symptoms can be bothersome. Understanding the causes, symptoms, and treatment options can help you manage keloids effectively. If you’re prone to keloids, taking preventive measures and seeking early treatment can improve outcomes.
Always consult a healthcare provider for personalized advice, especially if the keloid is causing pain, growing rapidly, or affecting your quality of life. With the right approach, you can reduce the impact of keloid scars and maintain healthy, comfortable skin.