Persistent Swelling After Car Accident: Is It Normal or a Cause for Concern? - Surgery

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After being thrown out in a car accident, there is persistent swelling near the right lower back and upper buttock area?


I apologize for your situation.
You mentioned that you were involved in a car accident on May 25, and now, 23 days later, the inner side of your waist is still swollen in the area marked in the picture, without any bruising.
You had an X-ray at the hospital, which showed no issues, and the swollen area feels numb when lightly touched.
Could this be due to insufficient healing time, or could it indicate the development of a tumor? I'm really worried.

Huang Minxin, 10~19 year old female. Ask Date: 2021/06/17

Dr. Li Zhonghuai reply Surgery


Hello! It is recommended to return for a follow-up appointment for the physician to perform an ultrasound.
This will assess the absorption of the hematoma.
Take care! Changhua Hospital cares about you!

Reply Date: 2021/06/17

More Info


After a car accident, experiencing persistent swelling can be concerning, and it's important to understand the potential causes and implications of such symptoms. In your case, having swelling in the inner side of your waist for 23 days without bruising, despite having an X-ray that showed no issues, raises a few considerations.

Firstly, it's essential to recognize that swelling can be a normal part of the healing process following trauma. When the body experiences an injury, it often responds with inflammation, which can lead to swelling as part of the natural healing process. This is especially true if there was any soft tissue damage, even if it wasn't visible on an X-ray. Soft tissue injuries, such as sprains or strains, can take time to heal and may not always present with bruising.

However, the duration of your swelling—23 days—does warrant further investigation. While some swelling can persist for weeks, especially in cases of soft tissue injury, it is crucial to monitor the situation closely. Here are some key points to consider:
1. Nature of Swelling: If the swelling is soft and non-tender, it may indicate fluid accumulation rather than a more serious issue. However, if the swelling becomes hard, painful, or shows signs of infection (such as redness, warmth, or fever), you should seek medical attention immediately.

2. Lack of Sensation: The fact that the swollen area does not have sensation when you touch it could indicate nerve involvement or damage. This is something that should be evaluated by a healthcare professional, as it may require further imaging or tests to assess nerve function and integrity.

3. Potential for Complications: While the likelihood of developing a tumor from a car accident is low, persistent swelling could indicate other complications, such as a hematoma (a localized collection of blood outside of blood vessels) or a seroma (a pocket of clear fluid that can develop after surgery or injury). These conditions can sometimes require drainage or further treatment.

4. Follow-Up Care: Since you have already had an X-ray, it may be beneficial to follow up with your healthcare provider. They might recommend additional imaging, such as an MRI or ultrasound, to get a better look at the soft tissues and assess for any underlying issues that may not have been visible on the X-ray.

5. Rest and Recovery: In the meantime, ensure you are giving your body adequate rest and care. Applying ice to the swollen area can help reduce inflammation, and elevating the area may also assist in decreasing swelling. Over-the-counter anti-inflammatory medications, if not contraindicated for you, can also help manage swelling and discomfort.

In summary, while some swelling can be a normal part of the healing process after a car accident, persistent swelling for over three weeks should be evaluated by a healthcare professional to rule out any complications. It is always better to err on the side of caution, especially when it comes to your health. If you have any new symptoms or if the swelling worsens, do not hesitate to seek medical attention.

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