Top Causes of Upper Arm Muscle Discomfort
Discover the primary causes of upper arm muscle pain, including strains, injuries, fractures, and other health issues. Learn when to seek medical help and how to manage discomfort effectively, ensuring proper recovery and health maintenance.

If you experience discomfort or pain in your upper arm muscles, it can hinder daily activities and exercise routines. Often, the cause is obvious, like lifting heavy objects or a recent injury. However, several other factors can contribute to upper arm muscle pain. This article highlights the most common reasons behind this type of discomfort.
Muscle Strain
Muscle strain occurs when your upper arm muscles are overstretched or torn, often resulting from vigorous activity or sudden movements. Complete tears can cause severe pain immediately after the incident. Resting the affected muscle is essential for recovery, while continuing activity can worsen the pain.
Shoulder Injury
An injury to the shoulder can cause inflammation and pain that radiates into the upper arm muscles. These injuries are frequent causes of upper arm discomfort. Rest and avoiding strenuous shoulder movements can help in healing.
Humerus Fracture
A break in the upper arm bone, the humerus, can mimic muscle pain but often involves intense, localized pain, especially after falls or overhead sports activities. Immediate medical attention is necessary for proper diagnosis and treatment.
Additional Causes
Other possible causes include:
- Blood clot in the upper arm veins
- Infections in the humerus
- Cardiac issues such as heart attack
- Tumors in the upper arm bones (benign or malignant)
If you experience persistent or severe upper arm pain, consulting a healthcare professional is crucial for accurate diagnosis and effective treatment.
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