After an Accident ยท California

Swelling, Bruising & Soreness After an Accident

Swelling, bruising, and body-wide soreness are the body's normal response to impact, but the amount and location can tell you a lot about how serious the underlying injury might be.

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We are not a law firm or a medical provider. We connect you with doctors who treat these injuries.

Why this happens

Impact damages small blood vessels under the skin (bruising) and triggers the body's inflammatory response (swelling), which is why both often get worse over the first 24-72 hours before improving. Soreness that shows up in muscles you didn't even think were involved in the accident is also normal, your body braces and tenses in ways you don't consciously control during a sudden impact.

When this is a medical emergency

See a doctor promptly, not just rest and wait, for:

  • Swelling that's rapidly increasing rather than gradually improving
  • A bruise that's unusually large, hard, or extremely painful to the touch
  • Swelling in a limb that also feels cold, tight, or discolored
  • Bruising with no clear cause, or bruising that appears far from where you were actually hit

Commonly linked to these accident types

This symptom shows up often after these kinds of accidents. Find help specific to your situation.

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Care options for this symptom

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Frequently asked questions

Why does bruising sometimes get worse a day or two after the accident, then show up somewhere else?

Bruising can migrate as blood pools and settles under the skin due to gravity, so a bruise from your knee might show up lower on your leg a few days later. This is usually normal, but a doctor can confirm nothing more serious is going on if you're unsure.

Is it normal to be sore all over, not just where I was hit?

Yes. The body tenses many muscles at once during a sudden impact, similar to overdoing a workout, which can cause soreness in areas that weren't directly struck. This typically improves over several days.

How long should swelling take to go down before I should worry?

Mild swelling from a bruise or strain usually peaks within the first two to three days and then gradually improves. Swelling that keeps increasing past that point, or that comes with significant pain, warmth, or discoloration, should be evaluated.

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