Second-Degree Burns: Causes of Swelling and Complications - Surgery

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Second-degree burn on the ankle caused by motorcycle exhaust pipe?


Hello, doctor.
I would like to ask about my condition.
I was injured on my ankle by a motorcycle's small exhaust pipe, resulting in a second-degree burn.
I have been changing the dressing daily, and the wound has been gradually healing, but it hasn't fully recovered yet.
Suddenly, one day, the wound became swollen, and when I touched it, I felt a hard lump.
Sometimes it hurts, and sometimes it doesn't, but the lump suddenly ruptured.
What could be the reason for this swelling?

Bai Xiong, 30~39 year old female. Ask Date: 2021/06/24

Dr. Li Zhonghuai reply Surgery


Hello! For burns, it is generally recommended to change the burn ointment 2 to 3 times a day and avoid contact with tap water.
The wound should not come into contact with tap water until the epidermis has healed, as this could lead to complications such as cellulitis.
It is advisable to follow up at a surgical outpatient clinic.
Take care! Changhua Hospital cares about you!

Reply Date: 2021/06/24

More Info


Second-degree burns are characterized by damage to both the epidermis (the outer layer of skin) and part of the dermis (the underlying layer). This type of burn can result from various sources, including hot liquids, flames, or contact with hot surfaces, such as the exhaust pipe of a motorcycle, as you described. The symptoms typically include redness, swelling, pain, and blistering. Healing can take time, and complications can arise during the recovery process.

In your case, the swelling and the presence of a hard lump at the site of the burn could indicate several potential issues. One common cause of swelling in burn injuries is the body's inflammatory response. When the skin is damaged, the body sends extra blood and immune cells to the area to promote healing, which can lead to swelling. However, if the swelling is significant or accompanied by a hard lump, it may suggest the development of a seroma or hematoma.

A seroma is a collection of fluid that can accumulate in the space where tissue has been damaged. It often occurs after surgery or trauma and can cause swelling and discomfort. A hematoma, on the other hand, is a localized collection of blood outside of blood vessels, usually due to bleeding from damaged blood vessels. Both conditions can lead to increased pressure in the area, resulting in pain and discomfort.

The fact that the lump has ruptured is concerning. If the lump was a seroma, it might drain fluid, which could lead to a temporary reduction in swelling. However, if it was a hematoma, the rupture could lead to further complications, such as infection or delayed healing. It's essential to monitor the site for signs of infection, which can include increased redness, warmth, pus or drainage, and worsening pain.

In terms of treatment, it is crucial to continue following your healthcare provider's instructions for wound care. Keeping the area clean and protected is vital to prevent infection. If the swelling persists, the lump returns, or if you notice any signs of infection, you should seek medical attention promptly. Your healthcare provider may need to drain the area or prescribe antibiotics if an infection is present.

Additionally, if you experience increased pain, fever, or any other concerning symptoms, do not hesitate to contact your healthcare provider. They may recommend imaging studies, such as an ultrasound, to assess the area further and determine the best course of action.

In summary, while swelling and the formation of a lump at the site of a second-degree burn can be part of the healing process, it is essential to monitor the situation closely. If the lump is painful, has ruptured, or shows signs of infection, seek medical advice to ensure proper care and recovery.

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