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A dermatofibroma is a small, benign (non-cancerous) growth typically found on the skin of adults between the ages of 20 and 49. Also called benign fibrous histiocytoma, this bump often appears on the arms or legs and can feel quite firm or hard to the touch. Some medical professionals also refer to these as fibrous dermatofibromas, sclerosing hemangiomas, dermal fibrous histiocytomas, or nodular subepidermal fibrosis. Despite the multiple names, they’re all describing the same type of skin lesion.
Most dermatofibromas range from a pinhead size (around 3 millimeters) to about the size of a pea or a bit larger (up to 10 millimeters). Their colors can vary—some appear brown or tan, others may be pinkish, reddish, or even slightly purple. If you pinch or press them, they often produce a dimple in the center, which is a helpful diagnostic clue. Although dermatofibromas are usually harmless, they can sometimes itch, become tender, or get irritated by clothing and daily activities.
The exact reason dermatofibromas develop isn’t entirely clear. They arise from an overgrowth of fibroblast cells in the dermis (the deeper layer of the skin). What sparks that overgrowth? For many people, it happens after some minor skin trauma, such as:
In most cases, a single dermatofibroma appears. Occasionally, individuals may develop several, especially if their immune system is compromised or they have underlying health conditions that make them more susceptible to skin growths. Still, the majority of dermatofibromas stay solitary and remain stable over the years.
The reassuring news is that dermatofibromas are benign. They don’t evolve into cancer, spread to other areas of the body, or threaten your general health. However, they can sometimes cause local discomfort if they are in a high-friction area, such as where waistbands, bra straps, or other tight clothing rub against them. They can also occasionally itch or feel tender. But from a serious medical standpoint, dermatofibromas do not pose significant health risks in and of themselves.
If you notice a lump on your skin that’s changing color, bleeding, or growing rapidly, it’s always a good idea to get it checked—just to rule out other conditions. While dermatofibromas are benign, it’s essential to confirm the diagnosis, especially if the lesion exhibits any atypical characteristics (for instance, extremely rapid growth or irregular pigmentation).
Dermatofibromas are caused by the overgrowth of the dermis layer of the skin. The exact cause is unknown, but they may develop after minor skin injuries such as splinters or bug bites. Most cases involve a single dermatofibroma, though multiple growths can occur in individuals with weakened immune systems.
Many people with dermatofibromas choose to leave them alone because they rarely cause serious health problems. However, you might consider treatment or removal if:
Here at TMSC in Toronto, Oakville, and Vaughan, we specialize in minimally invasive methods to remove dermatofibromas. Our board-certified surgeons focus on achieving the best cosmetic outcome, leaving you with minimal scarring and a smooth recovery. Below are the primary treatment methods we may recommend:
Note: While some other skin growths respond well to topical treatments or laser therapy, dermatofibromas are made of fibrous tissue, which is quite dense. As a result, surgical excision remains the most reliable solution for permanent removal.
Coverage for dermatofibroma treatment by the Ontario Health Insurance Plan (OHIP) depends on the reason for removal. If the removal is deemed medically necessary, such as when the dermatofibroma is painful, recurrently irritated, or suspicious for malignancy, OHIP may cover the procedure. However, if the removal is for cosmetic reasons, it is unlikely to be covered by OHIP. Consult with our clinic to understand your specific case and potential coverage options.
When removal is deemed medically necessary, OHIP usually covers the main costs. However, if you opt for cosmetic removal or additional cosmetic enhancements (like specialized suturing techniques or advanced scar treatments), some of these extras might not be covered by insurance. We encourage patients to:
If the lesion is completely excised, the chances of regrowth in the same spot are extremely low. However, it’s possible to develop another dermatofibroma elsewhere on your body if the root cause—like minor skin injuries—occurs again.
Most people find the procedure very tolerable. Since we use local anesthesia, you’ll feel minimal to no pain during the excision. You might experience mild soreness or tenderness for a few days afterward, but over-the-counter pain relievers can usually help.
In many cases, a visual examination or dermatoscopy is enough for a trained professional to diagnose a dermatofibroma. However, if there’s any doubt about the nature of the lesion—especially if it looks atypical—a biopsy may be performed to rule out other conditions.
Because the exact causes aren’t fully understood, there’s no guaranteed prevention strategy. However, protecting your skin (e.g., wearing gloves when doing yard work to avoid splinters) and maintaining overall skin health can be helpful. If you notice a bite or small wound, keep it clean to reduce irritation or complications.
While you might see suggestions online for creams, ointments, or home remedies, dermatofibromas are fibrous growths that generally don’t respond to topical treatments. Attempting self-removal or using harsh chemicals can lead to infection, scarring, or other complications. Professional evaluation is always recommended.
Any procedure that involves an incision can result in some level of scarring. That said, our surgeons at TMSC focus on minimally invasive techniques and strategic closure methods to keep scars as inconspicuous as possible. Over time, most scars fade significantly and become less noticeable.
For the majority of patients, a dermatofibroma is an isolated, benign skin change. Having one does not necessarily point to any serious underlying condition. However, if you suddenly develop multiple dermatofibromas, it’s a good idea to discuss this with your healthcare provider, as it might signal an immune system concern or another systemic factor.
Dermatofibromas, while common and harmless, can sometimes be a source of annoyance—particularly if they catch on clothing, cause mild pain, or prompt cosmetic concerns. Knowing the causes, symptoms, and treatment options can give you peace of mind. Whether you decide to leave your dermatofibroma alone or opt for removal, it’s reassuring to know that these lesions do not carry the serious risks associated with malignant skin growths.
Still, if you have any doubts—especially if a skin lesion appears unusual, fast-changing, or problematic—don’t hesitate to seek professional medical advice. A simple evaluation can rule out other conditions and help you feel confident about the best course of action. At TMSC, our goal is to provide clear guidance, safe and effective treatments, and a supportive environment where you can address any skin concerns with confidence.
At TMSC, patient care is our top priority. Our board-certified surgeons have extensive experience in diagnosing and removing dermatofibromas and other skin lesions. Here’s what sets us apart:
