Keloidal Nodules (Skin)

What is Keloidal nodules (skin)?

Keloidal nodules are firm, raised, flesh‑colored or pinkish lumps that develop in the skin when scar tissue grows excessively. Unlike ordinary scars, keloids extend beyond the original wound edges and do not regress over time. When a keloid forms a distinct, button‑like protrusion, it is often described as a keloidal nodule. These nodules can appear on any part of the body, but they are most common on the chest, shoulders, ear cartilage, and areas that have been repeatedly injured or tattooed.

They are the result of an over‑active fibroblast response—cells that produce collagen—leading to an abnormal accumulation of dense, fibrous tissue. While keloids are benign (non‑cancerous), they can be painful, itchy, and cause cosmetic concerns.

Common Causes

Several conditions or events can trigger the formation of keloidal nodules. Below are the most frequently reported causes:

• Traumatic skin injury – cuts, burns, surgical incisions, or severe abrasions.
• Acne vulgaris – especially severe cystic acne that ruptures deep into the dermis.
• Ear piercing – especially multiple piercings or large gauge jewelry.
• Vaccination sites – rare but documented after intramuscular injections.
• Dermatologic procedures – laser therapy, dermabrasion, cryotherapy, or tattoo removal.
• Genetic predisposition – family history of keloids increases risk up to 10‑fold.
• Hormonal influences – higher incidence during puberty and pregnancy.
• Skin conditions with chronic inflammation – such as psoriasis or chronic eczema.
• Infections – bacterial or fungal infections that cause deep skin inflammation.
• Radiation therapy – can induce abnormal scar formation in some patients.

Associated Symptoms

Keloidal nodules rarely occur in isolation. Patients often report one or more of the following accompanying signs:

• Itching or burning sensation.
• Pain, especially when the nodule is stretched or pressed.
• Hard, rubbery consistency compared with surrounding skin.
• Redness or violaceous discoloration around the nodule.
• Reduced mobility if the nodule is over a joint.
• Psychological distress due to cosmetic appearance.

When to See a Doctor

Most keloidal nodules are harmless, but medical evaluation is recommended if you notice any of the following:

• Rapid growth over days to weeks.
• Persistent pain, throbbing, or severe itching that interferes with sleep.
• Discharge of pus, blood, or foul‑smelling fluid.
• Redness that spreads beyond the nodule (possible infection).
• Changes in color (e.g., darkening, ulceration) or texture.
• Functional limitation, such as restricted movement of a nearby joint.
• Any uncertainty whether the lesion is a keloid versus a skin tumor.

Diagnosis

Healthcare providers use a combination of history, visual assessment, and occasionally special tests to confirm a keloidal nodule.

Clinical Evaluation

• History taking – duration, prior injuries, family history, and any preceding skin conditions.
• Physical examination – inspection for size, shape, color, and palpation for firmness.

Dermatologic Tools

• Dermatoscopy – magnified view to differentiate keloids from other nodular lesions.
• Ultrasound – assesses depth and vascularity; useful before intralesional injections.
• Biopsy (rarely needed) – a small skin sample examined under a microscope to rule out malignancy, especially if the lesion is atypical.

Laboratory Tests

Not routinely required, but a CBC and wound culture may be ordered if infection is suspected.

Treatment Options

Management balances cosmetic improvement, symptom relief, and prevention of recurrence. Treatment plans are individualized based on nodule size, location, and patient preference.

Medical (Clinic‑Based) Treatments

• Intralesional corticosteroid injections – triamcinolone acetonide is the most common; typically given every 4–6 weeks for 3–6 sessions. Reduces inflammation and collagen synthesis.
• Silicone gel sheets or dressings – applied for 12–24 hours daily for several months; helps flatten and soften nodules.
• 5‑Fluorouracil (5‑FU) or interferon‑α injections – used when steroids alone are ineffective.
• Laser therapy – pulsed‑dye or fractional CO₂ lasers improve texture and color.
• Cryotherapy – liquid nitrogen applied to the nodule; often combined with intralesional steroids.
• Radiation therapy – low‑dose external beam radiation after surgical excision; reserved for recalcitrant cases due to long‑term risk considerations.
• Surgical excision – removal of the nodule; must be followed by adjuvant therapy (e.g., steroids, radiation) to lower recurrence rates, which can be >50% without adjuncts.

Home and Lifestyle Measures

• Silicone gel or sheets – over‑the‑counter options can be continued at home after initial medical guidance.
• Massage therapy – gentle daily massage with a moisturizing lotion may improve pliability.
• Sun protection – UV exposure can darken keloids; use SPF 30+ sunscreen.
• Avoidance of tension – keep the area from stretching (e.g., tight clothing or repetitive motions).
• Allergy‑free skin care – fragrance‑free cleansers reduce irritation.

Prevention Tips

While not all keloids are preventable, the following strategies lower risk, especially for people with a known predisposition:

• Prompt wound care – clean and close cuts or surgical incisions with sutures or adhesives, and keep them moist with antibiotic ointment.
• Use pressure garments – after major surgery or burns, especially on the chest and shoulders.
• Apply silicone sheeting early – within the first month of wound healing.
• Minimize unnecessary skin trauma – avoid multiple piercings, aggressive acne picking, or repeated tattoo work.
• Discuss family history – inform surgeons or dermatologists if you have a keloid tendency; they may adjust incision techniques.
• Consider prophylactic steroid injections – in high‑risk patients post‑surgery, a single intralesional steroid dose can reduce keloid formation.

Emergency Warning Signs

If any of the following occur, seek immediate medical attention (e.g., urgent care, emergency department). These signs may indicate infection, rapid malignant transformation, or severe complications.

• Sudden, intense pain that worsens despite over‑the‑counter analgesics.
• Rapid expansion of the nodule within hours or a few days.
• Warmth, spreading redness, or swelling extending beyond the nodule.
• Yellowish or foul‑smelling discharge (purulent drainage).
• Fever ≥ 38 °C (100.4 °F) or chills accompanying the skin change.
• Ulceration or necrotic (black) tissue on the surface.
• Unexplained weight loss, night sweats, or fatigue with a growing skin nodule (rare, but warrants exclusion of malignancy).

References

• Mayo Clinic. Keloid scars: Symptoms & causes. Accessed April 2026.
• American Academy of Dermatology. Keloid. Updated 2023.
• National Center for Biotechnology Information. Current approaches to keloid treatment. Dermatologic Surgery, 2021.
• Cleveland Clinic. Keloids: Overview and treatment options. 2022.
• World Health Organization. Skin diseases: Global burden and management. 2020.