Delayed Healing: Why Your Skin Closed but Not the Wound Inside - Surgery

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The epidermis of the hand wound has healed, but it feels like the internal tissue is not healed?


Hello Doctor: About two weeks ago, I sustained a wound on my hand that measures approximately 1 cm in length and 0.5 cm in width, with a slight depth.
After a week, I noticed that the epidermis had grown back, but it appeared somewhat rotten and yellowish, so I thought it might be infected.
I peeled back the epidermis and found that there was indeed a hole inside with a significant amount of exudate.
I then re-disinfected and applied medication.
However, after another week, I noticed that the epidermis had grown back again (this time it felt like normal skin), but the hole inside does not seem to have healed, as I can see a noticeable color difference at the site through the epidermis, and it still hurts when I apply light pressure.
Since the epidermis has completely healed, I am now uncertain about how to proceed.
I would like to ask the doctor how I should handle this situation.
Additionally, I would like to know why, in general, wounds do not heal from the inside out.
Why is it possible for the epidermis to heal while the interior has not? Could it be that I did something that caused this situation?

Niming, 20~29 year old female. Ask Date: 2023/09/27

Dr. Chen Jiaming reply Surgery


It is not possible to answer your speculation based on your description.
I recommend that you visit a surgical outpatient clinic for an actual examination and treatment by a physician, which will provide you with a more accurate response.

Reply Date: 2023/09/27

More Info


When it comes to wound healing, the process can be complex and varies significantly depending on the depth and severity of the injury. Your situation, where the skin has closed but the underlying tissue has not healed properly, is not uncommon and can be attributed to several factors.

Firstly, it's essential to understand the stages of wound healing. The healing process generally occurs in three overlapping phases: inflammation, proliferation, and maturation. In your case, it seems that while the epidermis (the outer layer of skin) has healed, the dermis (the deeper layer) and possibly subcutaneous tissue have not fully recovered. This can happen for a variety of reasons, including infection, inadequate blood supply, or the presence of foreign material in the wound.

The yellowish discharge you observed could indicate the presence of pus, which is a sign of infection. If the wound is infected, it can hinder the healing process, causing the outer layer to close prematurely while the deeper layers remain compromised. This is why you might see a discrepancy between the healing of the surface and the underlying tissue.

Moreover, the fact that you felt the need to remove the newly formed skin suggests that there might have been a concern about infection or improper healing. However, this action can sometimes exacerbate the problem by reopening the wound and introducing more bacteria, which can lead to further complications.

Regarding your question about why the skin can heal while the underlying tissue does not, it’s important to note that the skin can regenerate faster than the underlying tissues, especially if the wound is not deep enough to stimulate a full healing response in the dermis. This can result in a situation where the epidermis appears intact, but the dermis is still healing, which can lead to pain and sensitivity in that area.

To address your concerns, here are some recommendations:
1. Consult a Healthcare Professional: Given the complexity of your wound healing, it is crucial to seek a thorough evaluation from a healthcare provider, preferably a wound care specialist or a surgeon. They can assess the wound, possibly perform imaging studies, and determine if there is any underlying issue that needs to be addressed.

2. Wound Care: Continue to keep the wound clean and dry. If you have been using topical antibiotics, ensure that they are appropriate for your type of wound. Avoid using hydrogen peroxide or alcohol, as these can damage healthy tissue and delay healing.

3. Avoid Picking at the Wound: It is essential to resist the urge to remove any scabs or newly formed skin, as this can lead to further injury and infection.

4. Moisture Balance: Keeping the wound moist can promote healing. Consider using a hydrogel or a specialized wound dressing that maintains a moist environment while allowing for gas exchange.

5. Monitor for Signs of Infection: Watch for increased redness, swelling, warmth, or discharge from the wound. If these symptoms occur, return to your healthcare provider for further evaluation.

6. Nutrition and Health: Ensure you are consuming a balanced diet rich in vitamins and minerals that support skin health, such as vitamin C, zinc, and protein.

In summary, while it may be frustrating to see the surface of your wound heal while the deeper layers remain compromised, this is a situation that can be managed with proper care and medical attention. Healing takes time, and addressing any underlying issues is crucial for complete recovery.

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