Keloid Scar - Causes, Treatment & When to See a Doctor

What is Keloid Scar?

A keloid scar is an abnormal type of scar that grows excessively beyond the original injury site. Unlike typical scars, which fade over time, keloids form when the body produces too much collagen during the healing process. They can continue to grow indefinitely and often appear as raised, firm masses of tissue. Keloids may be itchy, painful, or tender, though they don’t always cause discomfort. They are more common in people with darker skin tones, including Black, Hispanic, and Asian individuals, though anyone can develop them.

Keloids are distinct from hypertrophic scars, which also grow beyond the injury but remain confined to the wound’s boundary. Unlike keloids, hypertrophic scars may fade over time.

Key Characteristics of Keloids

• Location: Often found on the chest, shoulders, earlobes, or cheeks.
• Appearance: Typically firm, rubbery, and may have a shiny or reddish appearance in early stages.
• Growth: Can appear months or years after an initial injury.
• Hereditary Link: A family history of keloids increases the risk of developing them.

Common Causes

Keloids can form after various types of skin injuries. Below are the most common causes:

Injuries and Skin Trauma

• Cuts or Scratches: Even minor cuts can lead to keloids, especially if not properly treated.
• Burns: Thermal or chemical burns are a frequent trigger for keloid formation.
• Surgical Incision: Keloids may develop at the site of surgery, including biopsies or cosmetic procedures.
• piercings: Body piercings, particularly in high-risk areas like the ears, are associated with keloids.
• Insect Bites: Severe reactions to bug bites can sometimes cause keloids.

Other Triggers

• Acne: Deep cysts from severe acne can result in keloids.
• Tattooing: Improper tattoo techniques may lead to abnormal scarring.
• Pressure Sores: Common in individuals with limited mobility or chronic illnesses.
• Skin Manipulation: Prolonged stretching or friction on the skin (e.g., from tight clothing) may contribute.

While the exact cause isn’t fully understood, genetics and hormonal factors are believed to play a role. Sources: Mayo Clinic, National Institutes of Health (NIH).

Associated Symptoms

Keloids often come with physical or emotional symptoms. Common associated symptoms include:

Physical Symptoms

• Raised, Firm Texture: Keloids are usually thicker than normal scars.
• Itching or Irritation: Many people experience persistent itching that may not respond to standard treatments.
• Pain: Some keloids cause aching or tenderness, especially if they compress nerves or blood vessels.
• Color Changes: Early keloids may appear reddish or purplish, darkening over time.

Emotional Impact

• Self-Consciousness: Keloids in visible areas (e.g., face, neck) can lead to anxiety or low self-esteem.
• Social Stigma: Some individuals feel socially isolated due to their appearance.

If symptoms worsen or significantly affect quality of life, consult a dermatologist. Sources: Cleveland Clinic, World Health Organization (WHO).

When to See a Doctor

While not all keloids require treatment, certain signs indicate the need for professional care:

• Rapid Growth: If the scar expands after initial healing.
• Persistent Pain or Itching: Symptoms that don’t improve with home remedies.
• Infection Signs: Redness, warmth, swelling, or pus around the scar.
• Restricted Movement: When the keloid limits joint or limb function.
• Emotional Distress: Severe impact on mental health due to appearance.

Early intervention can prevent complications. Warning: Do not delay care if you notice signs of infection. Source: American Academy of Dermatology.

Diagnosis

Diagnosing keloids typically involves a physical exam. A doctor will assess the scar’s size, location, and symptoms. In rare cases, a biopsy might be performed to rule out other conditions like skin cancer or infection. Imaging studies are not usually needed unless the keloid is unusual in appearance or behavior.

What to Expect During Diagnosis

• Visual Inspection: The doctor will examine the scar’s texture and growth pattern.
• Medical History: They’ll ask about the injury that caused the keloid and any family history.
• Ruling Out Complications: If infection or other issues are suspected, additional tests may follow.

Most keloids are diagnosed based on appearance alone. Early consultation improves treatment outcomes. Source: National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS).

Treatment Options

Treatment aims to reduce the size, flatten the scar, and minimize symptoms. Options include medical procedures and home-based approaches.

Medical Treatments

• Corticosteroid Injections: These reduce inflammation and flatten keloids. Multiple sessions may be needed.
• Surgical Removal: Often combined with radiation therapy to prevent recurrence.
• Radiation Therapy: Used post-surgery to shrink the scar and lower regrowth risk.
• Laser Therapy: Breaks down collagen and improves scar appearance.
• Cryotherapy: Freezing the keloid to destroy excess tissue.

Home Remedies and Lifestyle Adjustments

• Silicone Sheets or Gels: Applied daily to flatten and soften scars.
• Onion Extract Cream: Some studies suggest it may reduce keloid size when used consistently.
• Avoid Moisture: Keep the area dry to prevent irritation.
• Pressure garments: For scars on limbs, to limit movement during healing.

Note: Consult a doctor before trying unproven remedies. Sources: NIH, PubMed Central (medical journals).

Prevention Tips

While not always preventable, certain strategies may reduce keloid risk:

• Wear Pressure Garments: After surgeries or injuries, to limit scar formation.
• Proper Wound Care: Keep cuts clean and covered to minimize infection risk.
• Avoid Unnecessary Skin Breakage: Limit piercings or tattoos in prone areas if possible.
• Use Sunscreen: Protect skin from UV damage, which can irritate scars.
• Manage Inflammation: Take anti-inflammatory medications as directed post-injury.

Individuals with a family history of keloids may benefit from discussing preventive options with a dermatologist. Source: Mayo Clinic, American Journal of Clinical Dermatology.

Emergency Warning Signs

Act immediately if you notice these red flags:

Seek emergency care for these symptoms to avoid severe complications like nerve damage. Source: Emergency Medicine Physicians Association.

Conclusion

Keloids are a challenging type of scar that can affect both physical health and emotional well-being. While not life-threatening, they often require intervention for management. Early diagnosis and a combination of treatments offer the best chance for improvement. For persistent or severe cases, consult a board-certified dermatologist to explore tailored options. Always prioritize professional medical advice before starting any treatment.

Reviewed by: Medical experts in dermatology. Last Updated: October 2023.