Can you get a cancerous tumor in your arm?

These cancers start in soft tissues like fat, muscle, nerves, fibrous tissues, blood vessels, or deep skin tissues. They can be found anywhere in the body, but most of them start in the arms or legs.

When should I worry about a lump in my arm?

Lumps caused by infection, inflammation or trauma are usually temporary and subside as the underlying condition resolves. Lumps that persist or continue to grow over time may signal more serious conditions, such as tumors. If you have any lump that is persistent or causes you concern, seek prompt medical care.

How do you know if you have cancer in your arm?


  • Bone pain.
  • Swelling and tenderness near the affected area.
  • Weakened bone, leading to fracture.
  • Fatigue.
  • Unintended weight loss.

What does a cyst on your arm look like?

It’s usually caused by a buildup of keratin under the skin. It looks like a skin-colored, tan, or yellowish bump filled with thick material. It may become swollen, red, or painful if it’s inflamed or infected.

What could cause a lump in your arm?

A Lump in the Arm can be caused due to an infection, inflammation, direct trauma, or a tumor which can be benign or malignant. Based on the cause of the lump in the arm, they can be single or multiple, painful or painless, tender or nontender. If an infection is causing a Lump in the Arm then it will appear as boils or an abscess.

What are some possible causes of a lump in your arm muscle?

Arm lumps can be caused by any number of conditions, including infections, inflammation, tumors or trauma. Depending on the cause, lumps may be single or multiple, soft or firm, painful or painless. They may grow rapidly or may not change in size. Arm lumps due to local infectious causes may appear as boils, or abscesses.

What causes bumps under the arms?

Causes of Bumps on the Arms. Bumps on specific body areas, manifested as a result of keratosis pilaris, are developed due to excess accumulation of a skin protein, known as keratin. The protein buildups block the skin pores and trap the hair follicles, thus resulting in unusual thickening of skin.

What causes a lump under the skin on the forearm?

A hard, painful lump on the forearm can be caused by trauma from an injury, or even an insect bite. Other less common causes include fatty tissue growth that forms a hard lump under the skin of the forearm.