After an Accident ยท California

Lump or Knot After an Accident

A new lump or hard knot after a crash is usually a bruise or tight muscle, but a few causes need medical attention, so it is worth showing a doctor.

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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

A blow can cause a pool of blood under the skin (a hematoma), swelling around a strained joint, or a tight muscle knot from spasm. A lump over a bone may be a bruised or fractured bone. Most settle over days to weeks, but a lump that grows, is very painful, or does not shrink should be examined. A lump on the head after any impact also deserves a check for concussion.

When this is a medical emergency

Go to an emergency room right away, don't wait for a regular appointment, if you have:

  • A lump on the head with vomiting, confusion, or drowsiness
  • A fast-growing, very painful, or hot swelling
  • A swelling with numbness, or a limb that looks pale or cold
  • A lump in the belly after the crash

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

Is a hard lump after a car accident normal?

Often it is a bruise or muscle knot. But if it is growing, very painful, or not shrinking, have a doctor look at it.

How long should a bruise lump take to go down?

Often a couple of weeks. If it is not shrinking after that, get it checked.

Can I be seen if I have no insurance?

Yes. Many California providers see accident patients on a medical lien basis, so you are seen first and billing is worked out later. Terms vary by provider, so ask for them in writing before you start.

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