Bruising and Numbness After a Bicycle Accident - Surgery

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Bruising after a car accident?


After falling from a motorcycle and hitting the inner thigh, a bruise developed.
Three days later, there is a persistent mild tingling sensation near the knee on the thigh, and the bruise is getting larger.

xuesheng, 10~19 year old female. Ask Date: 2021/10/28

Dr. Peng Xianwen reply Surgery


Dear students,
The bruising after being hit by a car will gradually improve.

Director Peng Hsien-Wen, Department of Surgery, Nantou Hospital

Reply Date: 2021/10/28

More Info


After a bicycle accident, experiencing bruising and numbness can be concerning, especially when the symptoms seem to worsen over time. Based on your description, it sounds like you have sustained a contusion (bruise) on the inner thigh, which is common in accidents where the leg impacts a hard surface or object. The bruising occurs due to blood vessels breaking under the skin, leading to discoloration and swelling.
The numbness you are experiencing near the knee could be attributed to several factors. One possibility is that the impact may have caused some swelling or hematoma (a localized collection of blood outside of blood vessels) that is pressing on nearby nerves, leading to a sensation of numbness or tingling. This is particularly plausible if the bruise is expanding, as the swelling can increase pressure on surrounding tissues, including nerves.

It is also important to consider the possibility of a more serious injury, such as a muscle strain or tear, or even damage to the nerves themselves. If the numbness persists or worsens, or if you experience additional symptoms such as weakness in the leg, difficulty moving the knee, or severe pain, it is crucial to seek medical attention. A healthcare professional may recommend imaging studies, such as an ultrasound or MRI, to assess the extent of the injury and rule out any serious underlying conditions.

In terms of treatment, the R.I.C.E. method is often recommended for managing bruises and soft tissue injuries:
1. Rest: Avoid activities that could aggravate the injury. This includes refraining from cycling or any strenuous exercise until you have fully recovered.


2. Ice: Apply ice packs to the bruised area for 15-20 minutes every hour as needed. This can help reduce swelling and numb the pain.

3. Compression: Use an elastic bandage or compression wrap to help minimize swelling. Be careful not to wrap it too tightly, as this could impede circulation.

4. Elevation: Keep the injured leg elevated above the level of your heart when possible to help reduce swelling.

As for the timeline for recovery, bruises typically heal within 2 to 4 weeks, but this can vary based on the severity of the injury and individual healing rates. If the numbness does not improve within a few days or if you notice any new symptoms, it is advisable to consult a healthcare provider for a thorough evaluation.

In conclusion, while bruising and mild numbness after a bicycle accident can be common, it is essential to monitor your symptoms closely. If you have any concerns about the severity of your injury or if your symptoms worsen, do not hesitate to seek medical advice. Early intervention can help prevent complications and ensure a smoother recovery.

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