Painless Lump on Upper Arm: Causes & When to See a Doctor
A painless upper-arm lump should be evaluated by a medical professional. Possible causes include:
- Lipoma: Benign fatty tumor.
- Cyst: Fluid-filled sac.
- Muscle strain/tear.
- Tendonitis: Tendon inflammation.
- Nerve damage: From injury or compression.
- Lymphadenopathy: Swollen lymph nodes (infection, inflammation, other conditions).
Rarely, it may indicate cancer or bone infection. Diagnosis involves physical exam, imaging, and possibly biopsy. Prompt evaluation ensures appropriate treatment.
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