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Understanding Wound Healing: A Simple Guide

Jeffrey H. Miller, M.D.
Jun 24
3 min read

Updated: Jul 30

Wound healing is a fascinating and complex process that our bodies go through to repair damaged tissues.

Whether it's a small cut or a more severe injury, our bodies have an incredible ability to heal themselves.

Let's take a closer look at how this process works.

A photo showcasing a leg wound covered in a bandage, healing.

Jump to a Certain Section

The Most Common Cause of Leg Ulcers (Wounds)
The Four Phases of Wound Healing
Types of Wounds
The Role of Biofilm in Chronic Wounds
Importance of Hyaluronic Acid and Collagen
Conclusion

The Most Common Cause of Leg Ulcers (Wounds)

People are surprised to learn that chronic venous insufficiency (CVI) is the most common cause of leg ulcers. In fact, CVI is more common than diabetic foot ulcers or wounds related to peripheral arterial disease.

The Four Phases of Wound Healing

Hemostasis: This is the first phase that kicks in immediately after an injury. Blood vessels constrict to reduce blood flow, and platelets (a type of blood cell) stick together to form a clot. This clot acts like a plug to stop the bleeding and provides a foundation for the next stages of healing.
Inflammation: In this phase, the body's immune system gets to work. White blood cells, such as neutrophils and macrophages, rush to the wound site to fight off any potential infections and clean up debris. This phase is characterized by redness, heat, swelling, and pain.
Proliferative Phase: During this stage, new tissue starts to form. Cells called fibroblasts produce collagen, a protein that helps to rebuild the tissue. New blood vessels also form to supply the area with nutrients and oxygen. The wound begins to contract as the edges are pulled together.
Remodeling: The final phase involves the maturation and strengthening of the new tissue. Collagen fibers are reorganized, and the tissue gradually gains strength. This phase can continue for months or even years, resulting in a scar.

Types of Wounds

Wounds can be classified into two main categories: acute and chronic.

Acute Wounds: These are typically caused by trauma, such as cuts, burns, or surgical incisions. They usually heal within a predictable timeframe through the four phases mentioned above.

Chronic Wounds: These wounds fail to heal properly and remain stuck in the inflammatory phase. Conditions like diabetes, poor circulation, and especially chronic venous insufficiency can contribute to the development of chronic wounds. They require special care and treatment to promote healing.

The Role of Biofilm in Chronic Wounds

Biofilm is a slimy layer of bacteria that can form on the surface of chronic wounds. This biofilm acts as a barrier, preventing the wound from healing and making it resistant to antibiotics. Managing biofilm is crucial for the successful treatment of chronic wounds.

Importance of Hyaluronic Acid and Collagen

Hyaluronic acid and collagen play vital roles in the wound healing process. Hyaluronic acid helps with cell migration and proliferation, while collagen provides the structural framework for new tissue. Both are essential for proper wound healing and minimizing scarring.

Conclusion

Understanding the wound healing process can help us appreciate the body's remarkable ability to repair itself. Whether it's a minor cut or a more serious injury, knowing how wounds heal can guide us in providing the best care and treatment. Remember, proper wound care is essential for a speedy and successful recovery.

Reference

Han, G., & Ceilley, R. (2017). Chronic wound healing: A review of current management and treatments. Advances in Therapy, 34(3), 599–610. https://doi.org/10.1007/s12325-017-0478-y

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