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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.

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Your triceps is a large muscle in your upper arm that connects at the elbow joint. It is vulnerable to overuse injuries from sports, and may hurt because of injuries to nearby tendons.
An armpit lump, or axillary lump, is often caused by swollen lymph nodes in the armpit. This condition can also be associated with tenderness or pain in the lump under the arm. A small or pea-sized lump in the armpit can also be caused by a skin infection, like a cyst, or ingrown hair. Read below for more causes and treatments options.
The muscle on the front part of your arm—the one you flex to show strength—can tear in an instant. An orthopedist can help figure out whether you can heal with just physical therapy or if you need surgery.
Biceps tendonitis is painful inflammation of the tendon that connects the bicep to the bones of the shoulder, usually due to overuse. Symptoms of biceps tendonitis include a throbbing, aching pain in the shoulder that may radiate down the arm.
A painful lump on your arm can be a boil, cyst, or inflammation of the skin—or as serious as a skin cancer.
Folliculitis causes red itchy or painful bumps. It is an inflammation of the hair follicle and can occur almost anywhere on the body. It can go away on its own or with medication.

6 Causes of Itchy Armpits

Most of the time, itchy underarms are from something simple--deodorant you’re allergic to, soap that irritates your skin, or infected hair follicles. But it could also be a sign of a yeast or fungal infection.
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Upper Arm Bruise Causes & Treatment Options

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.
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What Causes Numbness on One Upper Arm & What to Do Next

Numbness in the upper area of one arm can be caused by an injury, a compressed nerve, or muscle overuse. Other causes of numbness and tingling in the upper arm include a pinched nerves within the neck or a mini stroke. Figure out what is causing it and how to get relief.
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Bicep Pain Symptoms, Causes & Common Questions

Understand your bicep pain symptoms with Buoy, including 4 causes and common questions concerning your bicep pain.
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