a Lump in the Abdomen After a Fall: Causes and Concerns - Surgery

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Hello Doctor: Four days ago, I fell down the stairs, and when I got home, I noticed a large bruise on the left side of my waist near the front (about the size of a palm).
Later, I discovered that there was a circle without bruising in the middle (about the size of a fifty-cent coin), and the area without bruising feels like there is a lump.
Over the past two days, the lump has started to hurt.
I would like to know what could be the cause?

A De, 20~29 year old female. Ask Date: 2018/04/25

Dr. Ke Fangxu reply Surgery


It should be a subcutaneous hematoma.
If it is not continuously enlarging or causing severe pain, it is not a concern.
However, you may want to have a physician examine it to check for any other injuries.

Reply Date: 2018/04/25

More Info


After a fall, the presence of a lump in the abdomen, especially accompanied by bruising, can be concerning and warrants careful evaluation. The symptoms you describe—a large bruise on the left side of your abdomen with a central area that is not bruised but has developed a lump—could indicate several potential issues.

Firstly, the bruise itself suggests that there was some degree of trauma to the blood vessels in that area, leading to bleeding under the skin (hematoma). The lump you feel could be a hematoma that has formed as a result of the injury. Hematomas can sometimes feel firm or tender, especially as they begin to resolve and the body reabsorbs the blood. The central area that is not bruised could represent a localized area of swelling or a collection of fluid that has not yet been affected by the bruising.

Another possibility is that the lump could be a muscle strain or tear. The abdominal muscles can be strained during a fall, especially if there was any twisting or sudden movement involved. This could lead to localized swelling and tenderness in the area.

In some cases, the lump could also be indicative of a more serious condition, such as an internal injury. If there was significant force during the fall, there could be damage to internal organs or structures, leading to bleeding or swelling in the abdominal cavity. Conditions such as a splenic rupture or liver laceration can occur, although these are less common.

Given that the lump has started to cause pain, it is essential to monitor the situation closely. If the pain worsens, if you experience increasing swelling, or if you develop other symptoms such as fever, nausea, vomiting, or changes in bowel or urinary habits, you should seek medical attention immediately. A healthcare provider may recommend imaging studies, such as an ultrasound or CT scan, to assess the extent of any internal injuries and to determine the nature of the lump.

In summary, while the lump you are experiencing could be a hematoma or muscle strain resulting from your fall, it is crucial to remain vigilant for any signs of complications. If you have any concerns or if your symptoms change, do not hesitate to consult a healthcare professional for a thorough evaluation.

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