Keloidal Scarring: Causes, Symptoms, and Treatment

What is Keloidal Scarring?

Keloidal scarring, often referred to as keloids, are raised, thickened areas of scar tissue that form at the site of a skin injury. Unlike normal scars, which typically fade over time, keloids extend beyond the original wound boundaries and may continue to grow. They can be itchy, painful, or tender to the touch. Keloids are more common in people with darker skin tones and can occur anywhere on the body, though they are most frequently found on the chest, shoulders, earlobes, and cheeks.

According to the Mayo Clinic, keloids are not harmful to your health but can be a cosmetic concern. They are caused by an overproduction of collagen during the healing process.

Common Causes

Keloidal scarring can develop from various types of skin injuries. Here are some common causes:

• Surgical incisions: Cuts made during surgery can lead to keloid formation, especially in individuals prone to keloids.
• Acne scars: Severe acne can leave behind keloidal scars, particularly on the face, chest, and back.
• Burns: Thermal, chemical, or friction burns can result in keloids as the skin heals.
• Piercings: Earlobe piercings and other body piercings are common sites for keloid development.
• Vaccination sites: Keloids can form at the site of injections or vaccinations.
• Chickenpox scars: Scratching chickenpox blisters can lead to keloidal scarring.
• Trauma or injuries: Any cut, scrape, or abrasion can potentially develop into a keloid.
• Tattoos: The needle punctures from tattoos can sometimes result in keloids.
• Insect bites: Scratching or irritating insect bites can lead to keloid formation.
• Genetic predisposition: Some people are more prone to keloids due to their genetic makeup.

According to the National Institutes of Health (NIH), keloids are more likely to develop in people with a family history of keloidal scarring.

Associated Symptoms

Keloidal scarring can present with several symptoms, which may vary depending on the size and location of the keloid. Common symptoms include:

• Raised, thickened skin: Keloids are typically raised above the surrounding skin and have a firm, rubbery texture.
• Itching: Many keloids are itchy, which can be bothersome and lead to further irritation.
• Pain or tenderness: Some keloids can be painful or tender to the touch, especially if they are located over a joint or an area with frequent movement.
• Discoloration: Keloids can be pink, red, or darker than the surrounding skin, depending on the individual's skin tone.
• Growth over time: Unlike normal scars, keloids can continue to grow and expand beyond the original wound site.
• Cosmetic concerns: Keloids can be unsightly, especially if they are large or located in visible areas like the face or ears.

The American Academy of Dermatology (AAD) notes that keloids can sometimes cause emotional distress due to their appearance.

When to See a Doctor

While keloids are generally harmless, there are certain situations where you should seek medical advice:

• If the keloid is causing significant pain or discomfort.
• If the keloid is growing rapidly or changing in appearance.
• If the keloid is located in an area that restricts movement or function (e.g., near a joint).
• If the keloid becomes infected (signs include increased redness, warmth, swelling, or pus).
• If the keloid is causing emotional distress or affecting your self-esteem.
• If you are unsure whether the growth is a keloid or another type of skin condition (e.g., a tumor or cyst).

A dermatologist can evaluate the keloid and recommend appropriate treatment options. Early intervention can sometimes prevent the keloid from growing larger.

Diagnosis

Diagnosing keloidal scarring typically involves a physical examination by a healthcare provider, usually a dermatologist. Here’s what you can expect during the diagnostic process:

• Medical history: Your doctor will ask about your history of skin injuries, surgeries, piercings, or other potential causes of the keloid. They may also ask about your family history of keloids.
• Physical examination: The doctor will examine the keloid, noting its size, shape, color, texture, and location. They will also check for signs of infection or other complications.
• Biopsy (rarely needed): In some cases, if the diagnosis is unclear, your doctor may perform a biopsy. This involves removing a small sample of the tissue and sending it to a lab for analysis to rule out other conditions like skin cancer.

According to the Cleveland Clinic, keloids are usually diagnosed based on their appearance and medical history alone, without the need for additional testing.

Treatment Options

Treating keloidal scarring can be challenging, and no single treatment works for everyone. Treatment aims to reduce the size of the keloid, relieve symptoms like itching or pain, and improve cosmetic appearance. Here are some common treatment options:

Medical Treatments

• Corticosteroid injections: These are the most common treatment for keloids. Injections of corticosteroids (e.g., triamcinolone) can help reduce inflammation, flatten the keloid, and relieve itching. Multiple sessions may be required.
• Surgical removal: Surgery involves cutting out the keloid. However, keloids can recur after surgery, sometimes even larger than before. Surgery is often combined with other treatments like steroid injections or radiation to reduce the risk of recurrence.
• Laser therapy: Laser treatments, such as pulsed-dye lasers, can help flatten keloids and reduce redness. This option is often used in combination with other treatments.
• Cryotherapy: This involves freezing the keloid with liquid nitrogen to reduce its size. Cryotherapy is often used for smaller keloids and may require multiple sessions.
• Radiation therapy: Low-dose radiation can be used after surgical removal to prevent the keloid from recurring. This is typically reserved for severe or recurrent cases.
• Pressure therapy: Applying pressure to the keloid with special dressings or silicone gel sheets can help flatten it over time. This is often used after surgery or other treatments.
• Interferon or 5-fluorouracil (5-FU) injections: These medications can help reduce the size of keloids by inhibiting collagen production. They are often used in combination with steroid injections.

Home and Alternative Treatments

• Silicone gel sheets: These can be applied to the keloid to help flatten and soften it. They are available over-the-counter and are often used after other treatments.
• Onion extract gels: Some studies suggest that onion extract (e.g., Mederma) may help reduce the size and appearance of keloids, though results can vary.
• Massage: Gently massaging the keloid with a moisturizing cream or oil may help soften the tissue and reduce itching.
• Aloe vera: Applying aloe vera gel may help soothe itching and reduce inflammation, though it is unlikely to significantly reduce the size of the keloid.

The National Center for Biotechnology Information (NCBI) notes that combination therapies, such as surgery followed by steroid injections or radiation, tend to have the highest success rates for treating keloids.

Prevention Tips

Preventing keloidal scarring can be challenging, especially if you are genetically predisposed. However, the following tips may help reduce your risk:

• Avoid unnecessary skin trauma: Be cautious with activities that could lead to cuts, burns, or other injuries. If you are prone to keloids, consider avoiding elective surgeries, piercings, or tattoos.
• Treat wounds promptly: Clean and care for any cuts, scrapes, or burns immediately to promote proper healing. Keep the wound moist and covered with a bandage to reduce scarring.
• Avoid picking or scratching: Refrain from picking at scabs, acne, or insect bites, as this can increase the risk of keloid formation.
• Use pressure or silicone sheets: If you have a wound that is healing, applying pressure with a silicone gel sheet or dressing may help prevent keloid formation.
• Consider preventive treatments: If you are undergoing surgery and are prone to keloids, talk to your doctor about preventive measures, such as steroid injections or silicone sheets, to reduce the risk of keloid formation.
• Protect your skin from the sun: Use sunscreen on healing wounds to prevent hyperpigmentation, which can make keloids more noticeable.

The World Health Organization (WHO) emphasizes the importance of proper wound care in preventing complications like keloidal scarring.

Emergency Warning Signs

While keloids themselves are not typically dangerous, there are some red flags that warrant immediate medical attention. Seek emergency care if you experience any of the following:

• Signs of infection: Increased redness, warmth, swelling, or pus draining from the keloid. This could indicate a bacterial infection that requires antibiotics.
• Severe pain: If the keloid becomes extremely painful, especially if the pain is sudden or worsening, it could signal an underlying issue.
• Rapid growth: If the keloid is growing very quickly, it may need to be evaluated to rule out other conditions, such as skin cancer.
• Bleeding: If the keloid starts bleeding without any apparent cause, seek medical attention.
• Ulceration: If the keloid develops open sores or breaks down, it could become infected or lead to further complications.

If you notice any of these emergency warning signs, contact your healthcare provider immediately or go to the nearest emergency room. Early intervention can prevent serious complications.

For more information on keloidal scarring, you can visit reputable sources like the Mayo Clinic, Centers for Disease Control and Prevention (CDC), or consult with a dermatologist.