The Terrifying Truth Behind the Mysterious Hard Bumps Spreading Across Your Hands

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3. Corns Can Appear on Fingers and Hands Too

Corns are another type of thickened skin caused by repeated pressure or friction.

They’re more commonly associated with the feet, but they can also develop on the hands.

A corn tends to be more localized than a callus and may form a small, firm area of thickened skin.

They can become uncomfortable when pressure is applied.

If you’ve recently changed your activities or started using a tool that repeatedly presses against a particular part of your hand, pay attention to whether the bump appears in that exact location.

Reducing the source of friction may help prevent the area from becoming worse.

4. Ganglion Cysts Can Cause Noticeable Lumps

A ganglion cyst is a fluid-filled lump that can develop near a joint or tendon.

Although these cysts are especially common around the wrist, they can also appear near the fingers.

A ganglion cyst may feel:

  • Smooth
  • Firm or rubbery
  • Rounded
  • Slightly movable
  • Larger or smaller depending on the location and activity

Some are painless.

Others can cause discomfort, particularly when the affected joint is moved or pressure is placed on the area.

Ganglion cysts are generally benign, but a healthcare professional can determine whether a lump is actually a cyst or something else.

It’s not a good idea to try to smash or puncture a suspected cyst at home.

5. Arthritis Can Cause Hard Bumps Around the Finger Joints

If the bumps are appearing around your finger joints, arthritis becomes another possibility.

Certain forms of arthritis can cause bony enlargements around the joints.

With osteoarthritis, for example, people may develop firm, hard enlargements around the end or middle joints of the fingers.

These can sometimes be associated with:

  • Joint stiffness
  • Pain
  • Reduced flexibility
  • Swelling
  • Changes in finger shape

The bumps may develop gradually over time.

Unlike a soft cyst, a bony enlargement generally feels very hard and may seem like it’s part of the joint itself.

If multiple finger joints are becoming enlarged or painful, it is worth having them evaluated rather than assuming they’re simply a cosmetic change.

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