Upper Arm
Make a muscle: The upper arm is home to our biceps—the Popeye muscle. It’s where we get most of our arm power from and, not to mention, adds a bit of sex appeal.
Editor's picks
- Severe pain in the upper arm is usually caused by trauma from an injury that can lead to bruising, dislocation, or fractures of the bone. Other causes of sharp pain in the upper arm can arise from infection to the upper arm skin, bones, or nerves.
- A painful lump in the armpit is most commonly caused by skin conditions like an armpit cyst or an armpit ingrown hair. A sore lump in the armpit can also be caused by swollen lymph nodes.
- Red armpits can also be itchy, painful, or appear as little red dots. The most common cause of red armpits is an allergic reaction to certain hygienic products or chemicals. Other irritants that cause redness in the armpit include scabies or infected hair follicles.
- A bruised upper arm can be painful and restrict your range of motion. The bruise is often purple or yellow, and often just needs time to heal. But sometimes there is an underlying cause.
- Upper left or right arm weakness can be caused by nerve damage or compression of the shoulder, repetitive strain injury of the shoulder, or a pinched nerve in the neck.
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What Causes Itchy Armpits?
What Causes Numbness on One Upper Arm & What to Do Next
Bicep Pain Symptoms, Causes & Common Questions
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