An uncommon but possible complication involving inflammation or bacterial invasion of a keloid scar
What is a Keloid Scar Infection?
Keloid Scar Infection occurs when a keloid scar becomes infected, typically due to bacterial entry through micro-tears, injury, or irritation of the scar tissue. While keloids themselves are not prone to infection, scratching, trauma, or improper care can allow bacteria to enter, leading to redness, swelling, warmth, pain, and sometimes pus formation.
This condition requires prompt attention to avoid worsening of the scar or systemic infection.
What causes a Keloid Scar Infection?
Infection can occur when the protective barrier of the skin is breached, allowing bacteria (often Staphylococcus aureus) to invade the keloid tissue. Common triggers include:
- Scratching the itchy surface of a keloid
- Irritation from jewelry or clothing
- Piercing through or near the keloid
- Excessive moisture or sweat buildup
- Invasive treatments, such as injections or surgery, without proper hygiene
- Poor wound care during or after scar formation
Who is at risk?
- Individuals with existing keloid scars
- Those who frequently scratch their scars due to itching
- People with poor hygiene or compromised immune systems
- Patients who undergo scar treatments without aseptic technique
- Individuals living in hot, humid environments, which increase sweat and bacteria buildup
What are the symptoms of Keloid Scar Infection?
- Increased redness and warmth around the keloid
- Swelling and tenderness
- Pain or throbbing sensation in the area
- Yellow or green pus oozing from the scar
- Fever (in more serious or systemic cases)
- Foul odor from the infected site
- Skin breakdown or ulceration in severe infections
How is Keloid Scar Infection diagnosed?
A diagnosis is usually based on:
- Visual examination of the keloid and surrounding skin
- Medical history, especially recent irritation, trauma, or scratching
- Swab culture of any discharge to identify the infecting organism
- In rare cases, blood tests if systemic infection is suspected
How is Keloid Scar Infection treated?
Treatment typically involves a combination of infection control and scar care:
- Topical or oral antibiotics – to treat the bacterial infection
- Warm compresses – to soothe the area and encourage drainage if needed
- Cleaning the area gently with antiseptic solutions
- Avoidance of further trauma or scratching
- Corticosteroid injections or creams (after infection is controlled) to manage keloid inflammation
- In severe cases, drainage of abscess or minor surgical cleaning may be needed
What is the prognosis for Keloid Scar Infection?
- Most infections resolve with appropriate antibiotic treatment
- If left untreated, infection can lead to worsening scarring, ulceration, or spread of infection
- Prompt care helps preserve the integrity of the scar and avoid further complications
- After healing, the scar may appear more prominent or irregular
Can Keloid Scar Infections be prevented?
Yes, prevention is important and includes:
- Avoiding trauma or scratching of the keloid
- Keeping the scar area clean and dry
- Avoiding tight clothing or accessories that rub against the keloid
- Using moisturizers or anti-itch creams to reduce scratching
- Following sterile technique during any scar treatments or procedures
- Consulting a healthcare provider promptly if signs of infection appear