14 Likely Causes of Pain in Right Arm

2. Arthritis

Arthritis is a common cause of right arm pain. It happens when one or more joints become inflamed or wear down over time. In osteoarthritis, the smooth cartilage that cushions the ends of bones gradually wears away. As it thins, the bones rub against each other, causing pain, stiffness, and sometimes a grinding or clicking feeling with movement.

Joint pain may worsen with activity and improve with rest, and swelling or tenderness can sometimes be felt around the affected joint. Limited range of motion or difficulty performing daily tasks with the arm may also develop as the condition progresses.

Rheumatoid arthritis follows a different process. It is an autoimmune condition in which the immune system attacks the joint lining. This reaction leads to swelling, warmth, and ongoing inflammation. The disease often affects joints on both sides of the body, though discomfort may feel more noticeable in the right arm for some people.

3. Carpal Tunnel Syndrome

Carpal tunnel syndrome can cause pain that travels from the wrist into the right arm. It occurs when the median nerve becomes compressed as it passes through a narrow passage in the wrist called the carpal tunnel. This nerve provides sensation to the thumb, index, middle, and part of the ring finger and helps control thumb movement. When pressure increases inside the tunnel, nerve signals are disrupted.

As a result, a person may notice numbness, tingling, or a burning sensation in the hand and fingers. Symptoms often develop gradually and tend to worsen at night. Some people wake with hand discomfort or feel the need to shake their hand for relief. With ongoing compression, pain may extend into the forearm and up the right arm. Weakness can also develop, making it harder to grasp or hold small objects.

Repeated hand use, such as typing, gripping tools, or holding a phone, can increase pressure in the tunnel and worsen symptoms. Risk factors include wrist injuries, diabetes, arthritis, thyroid disorders, pregnancy, and repetitive hand movements. It occurs more often in women and in adults over age 40.

4. Tennis Elbow

Tennis elbow, also known as lateral epicondylitis, is a common cause of pain on the outside of the right arm near the elbow. It develops when the tendons that attach the forearm muscles to the outer elbow become irritated from repeated use. Inflammation or microtears in these tendons contribute to pain and reduced strength in the affected arm.

Irritation begins where the tendons anchor to the bone at the outer elbow. Over time, pain may spread down the forearm and gradually worsen with activity. Symptoms often appear during gripping or wrist movements. Lifting objects, twisting a doorknob, using a computer mouse, or similar tasks can trigger discomfort.

Although linked to tennis, the condition affects many people who perform repetitive hand or wrist motions, such as typing, using tools, sewing, or playing certain musical instruments. Other signs may include tenderness when pressing on the outside of the elbow, weakness during gripping, and difficulty fully straightening the arm.

5. Radiculopathy

Radiculopathy occurs when a nerve root in the neck becomes irritated or compressed. Conditions such as a herniated disc, bone spurs, age-related spinal changes, injury-related swelling, or long-term poor posture can increase pressure on the nerve. Symptoms may worsen with certain movements, like turning the head, lifting the arm, or bending the neck, as these can further compress the nerve. Pain and other sensations may fluctuate throughout the day, often intensifying after periods of activity or prolonged sitting.

This pressure often causes pain that begins in the neck and travels down into the right arm. As the nerve struggles to transmit signals properly, the pain may feel sharp, burning, or electric. Tingling or numbness may also develop in the shoulder, arm, hand, or fingers, depending on which nerve root is affected. Persistent compression can affect muscle control. Weakness may develop in the arm or hand, making it harder to grip objects or lift the arm.

6. Dislocations

A dislocation occurs when the ends of two bones are forced out of position within a joint. When it happens on the right side, the shoulder is most commonly affected, followed by the elbow or fingers. Dislocations often result from a fall, direct impact, or sports injury.

The shoulder is especially prone to dislocation because it allows a wide range of motion. Repeated dislocations or a previous joint injury can increase the risk of future dislocations in the same arm. Immediate medical evaluation is important to properly realign the joint and prevent long-term complications, such as chronic instability or arthritis.

When the joint moves out of place, nearby ligaments and muscles may be stretched or torn. The arm may look out of alignment and be hard or impossible to move. Severe pain and swelling are common. Nearby nerves or blood vessels may also be affected, causing numbness, weakness, or changes in skin color or temperature.

7. Fibromyalgia

Fibromyalgia is a long-term condition that causes widespread pain throughout the body. It can involve the right arm along with the left arm, legs, back, and other areas. The pain often feels like a deep ache, burning, or throbbing sensation.

People with fibromyalgia may also experience stiffness, fatigue, or sleep disturbances, which can make arm discomfort feel more pronounced. The condition is associated with increased sensitivity in the nervous system. People with fibromyalgia process pain signals differently, so normal pressure or light touch may feel painful.

Unlike injuries or arthritis, right arm pain in fibromyalgia is not caused by inflammation or joint damage but by changes in how the brain and nerves interpret pain. The discomfort may persist, though its intensity often varies from day to day. Fibromyalgia affects women more often than men, but it can occur in anyone. It may run in families and sometimes begins after physical stress, illness, or emotional strain.

8. Frozen Shoulder

Frozen shoulder, also called adhesive capsulitis, causes pain and stiffness in the shoulder joint and can affect the right arm, making daily activities difficult. The condition begins when the connective tissue around the shoulder joint becomes inflamed. Early stages may involve a gradual loss of range of motion even before severe pain develops.

Symptoms often progress slowly over months, typically following three phases: a painful phase, a frozen/stiff phase, and a thawing/recovery phase. Over time, this tissue thickens, tightens, and gradually shrinks, restricting joint space and limiting movement. Pain often appears first and may worsen at night, sometimes disrupting sleep.

As the condition progresses, stiffness becomes more noticeable. A person may struggle to lift the arm, reach overhead, or move it behind the back. Frozen shoulders can develop after an injury or surgery that limits shoulder movement. It is more common in adults over age 40 and in people with diabetes or thyroid disorders. In many cases, no clear cause is identified.

9. Over-Exertion

Over-exertion is a common cause of right arm pain. It occurs when muscles, tendons, or joints are pushed beyond their normal limits during sports, heavy lifting, or repeated tasks such as carrying boxes, stocking shelves, typing, or using hand tools. The pain may develop immediately or appear hours to a day after the activity, and it often worsens with repeated use of the affected muscles.

Recovery typically improves with rest, gentle stretching, and gradual return to activity. Applying ice or cold packs soon after overuse may help reduce inflammation and soreness. Using supportive braces or adjusting ergonomics during repetitive tasks can also help prevent further strain. Gradual strengthening exercises for the arm and shoulder can also reduce the risk of recurring over-exertion injuries.

Poor posture can further increase strain on the shoulder and upper arm. When muscles are overworked, small tears can form in the fibers, leading to soreness, stiffness, and sometimes mild swelling. Tendons may also become irritated, causing pain with movement.

10. Circulation Problems

Circulation problems can cause right arm pain when arteries that supply oxygen-rich blood to the muscles and nerves become narrowed or blocked. This reduces oxygen delivery to the tissues, especially during activity. Poor circulation may also cause tingling, numbness, or a cold sensation in the arm or hand, reflecting reduced blood flow to peripheral tissues.

Symptoms may appear gradually or suddenly depending on the cause, and pain may improve with rest or elevation of the arm. One common cause is peripheral artery disease, in which fatty buildup gradually narrows the arteries over time. Reduced blood flow can lead to aching, cramping, or a feeling of heaviness in the arm that often worsens with movement and improves with rest.

Another cause is a blood clot that suddenly blocks an artery or vein in the arm. A clot may cause more sudden symptoms, including pain, swelling, warmth, changes in skin color, and a tight or tender feeling. Risk factors include smoking, diabetes, high blood pressure, high cholesterol, and older age.

11. Heart Attack

A heart attack happens when a coronary artery becomes blocked, cutting off blood flow to part of the heart muscle. Without enough oxygen, the tissue can begin to suffer damage within minutes. As this occurs, pain may spread beyond the chest.

Other warning signs may include sweating, lightheadedness, dizziness, or a feeling of impending doom, and symptoms can vary widely between individuals. Pain may come on gradually or suddenly, and some people may mistake it for indigestion, muscle strain, or fatigue. Right arm pain may appear as pressure, squeezing, or a heavy sensation that radiates from the chest into the shoulder and down the arm.

Some people feel this discomfort in both arms, while others notice it only on the right side. Women, in particular, may experience unusual tiredness, nausea, or shortness of breath without intense chest pain, which can make the condition harder to recognize. A heart attack is a medical emergency that requires immediate care.

12. Nerve Compression

Nerve compression happens when nearby tissues press on a nerve in the neck, shoulder, elbow, or wrist, disrupting normal signaling. This can cause pain that travels down the right arm. The pain may feel sharp, burning, or electric, often described as a “pinched nerve.” Symptoms can worsen with certain movements or positions that increase pressure on the nerve, such as lifting the arm, turning the head, or bending the elbow. Prolonged compression may also lead to muscle weakness or atrophy if left untreated over time.

Early intervention, including rest, posture adjustments, physical therapy, or ergonomic changes, can help reduce pressure on the nerve and prevent worsening symptoms. Tingling, numbness, or weakness may also develop in the arm, hand, or fingers. If the affected nerve is in the neck, pain can radiate from the neck into the shoulder and down the arm. This pattern, known as radicular arm pain, may include altered sensation in the fingers.

13. Cubital Tunnel Syndrome

Cubital tunnel syndrome occurs when the ulnar nerve becomes compressed along the inner side of the elbow, near the area commonly called the “funny bone.” The ulnar nerve provides sensation to the ring and little fingers and helps control fine hand movements.

Early signs may include numbness or tingling that comes and goes, often during daily activities or at night. Discomfort may spread along the inner forearm toward the elbow or into the hand. Repeated elbow bending, leaning on the elbow, or a past injury can increase pressure on the nerve, although sometimes no clear cause is found.

As pressure affects the nerve, tingling or a pins-and-needles sensation often develops in the ring and little fingers. Symptoms tend to worsen when the elbow remains bent for long periods, such as during phone use or sleep. If compression continues, hand muscles may weaken over time, and the fingers may begin to curl slightly if the condition is left untreated.

14. Thoracic Outlet Syndromes

Thoracic outlet syndromes happen when nerves or blood vessels are compressed at the base of the neck, between the first rib and the collarbone. This pressure can disrupt nerve signals or blood flow, leading to pain in the right arm.

Poor posture, repetitive overhead activity, or anatomical variations such as extra ribs or tight muscles can increase the risk of developing this condition. Symptoms often worsen when the arm is lifted or held overhead, as this position further narrows the thoracic outlet space.

When nerves are affected, pain usually begins in the neck or shoulder and travels down the arm. Tingling or numbness may occur in the hand and fingers, the arm may tire quickly, and grip strength may decrease. If a blood vessel is compressed, circulation to the arm may decline. Swelling can develop, and the hand may appear pale or slightly blue and feel cool to the touch. These vascular symptoms often affect one arm more than the other.