Skin Growths After Blister Rupture: Causes and Treatments - Dermatology

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After a blister on the finger bursts, a granuloma forms?


Hello Dr.
Wu, I have a question.
Due to my work, I developed a blister on my finger that later burst.
After wearing cotton gloves (which caused moisture buildup) for a while, the area where the blister broke has developed an irregular growth about one centimeter in size, slightly raised with a rough surface.
It appears to have small bubbles within the growth.
It doesn't hurt when touched, but there is a slight tingling sensation.

Hong, 20~29 year old female. Ask Date: 2021/06/20

Dr. Wu Yuxin reply Dermatology


You may need outpatient treatment.

Reply Date: 2021/06/20

More Info


When it comes to skin growths that develop after a blister has ruptured, there are several factors to consider regarding their causes and potential treatments. Blisters typically form as a protective response to friction, heat, or other forms of skin irritation. When a blister ruptures, the underlying skin may be exposed, leading to various healing responses, including the formation of new tissue.
In your case, the irregular growth that has developed after the blister rupture could be a few different things. One possibility is that it is a form of granulation tissue, which is a normal part of the healing process. Granulation tissue is characterized by its red, bumpy appearance and is composed of new connective tissue and tiny blood vessels. It often forms in areas where the skin has been damaged, and while it is generally harmless, it can sometimes become excessive, leading to a condition known as proud flesh.

Another possibility is that the growth could be a type of skin lesion known as a keloid or hypertrophic scar. Keloids are raised scars that extend beyond the original wound site, while hypertrophic scars remain within the boundaries of the wound but are raised. Both types can occur following skin injuries, including those from blisters.

The presence of small bubbles within the growth you described may indicate the formation of cysts or other fluid-filled structures, which can occur in response to irritation or inflammation. The fact that the area is not painful but has a tingling sensation could suggest nerve involvement or irritation of the surrounding tissues.

To address your concerns, here are some treatment options and recommendations:
1. Observation: If the growth is not causing pain or significant discomfort, it may be best to monitor it for changes. Many skin growths can resolve on their own over time.

2. Topical Treatments: Over-the-counter treatments containing silicone gel or silicone sheets can help flatten and soften raised scars. Additionally, keeping the area moisturized with a gentle, fragrance-free moisturizer can promote healing.

3. Medical Evaluation: It is advisable to consult a dermatologist for a thorough evaluation of the growth. They can determine whether it is benign or if further intervention is necessary. A biopsy may be performed if there is any concern about the nature of the growth.

4. Surgical Options: If the growth is bothersome or if it is determined to be a keloid or hypertrophic scar, surgical removal may be an option. This can be followed by treatments such as corticosteroid injections to reduce recurrence.

5. Avoid Irritation: Since you mentioned wearing cotton gloves that may have caused moisture buildup, it’s important to keep the area dry and avoid further irritation. Consider using breathable gloves or allowing the area to air out when possible.

6. Follow-Up Care: Regular follow-up with your healthcare provider is essential to monitor the growth and ensure that it is not changing in size or appearance.

In summary, while skin growths following blister rupture can be concerning, many are benign and part of the normal healing process. However, it is crucial to seek professional medical advice to ensure proper diagnosis and treatment tailored to your specific situation.

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