Arm numbness is a decrease in the size of the arm. It may be caused by a number of conditions, here are some of such medical conditions: Pressure upon the Arm: this may result from;
Sleeping with the hand under the head Sitting with the arm hanging over the back of a chair
Wearing straps or carrying a bag or rucksack
Inflated cuff during measuring blood pressure
Raising the Arms above the level of the Heart; keeping the hand(s) above the level of the heart during work or sleep can prevent appropriate blood perfusion of the hands, and cause numbness, tingling or partial paralysis of the hand(s) within few minutes.
Cold: in cold weather, narrowing of the arteries in the hands and fingers can prevent appropriate blood supply and thus numbness, tingling, pain or temporary paralysis of the hands and fingers.
Cervical Disk Syndrome: degenerative disc disease (DDD) or injury, like hyper-extension injury in car accidents (head moves rapidly toward the back), can result in bulging or herniated disc(s) pressing upon the cervical (neck) spinal nerves, thus causing symptoms of cervical disc syndrome.
Position/movement dependent pain, tingling or numbness in the neck, shoulders, upper back, arm, hand or fingers (when the roots of cervical spinal nerves are compressed) Stumbling gait, difficulty with fine hand moves, tingling in the body or legs (when the cervical spinal cord is compressed) Symptoms can appear immediately after the injury, or develop slowly over the weeks or months.
Diagnosis is made by a CT or MRI of the neck spine. Therapy includes immobilization, cold therapy followed by heat therapy, cervical traction, analgesics, muscle relaxants, physical therapy or surgical decompression of the nerve roots or spinal cord.
Cervical Spondylosis: is an age-related deformation of the cervical spine; deformed vertebra or discs can press upon the spinal cord or nerve roots in the neck and cause chronic symptoms, like in the cervical disc syndrome Disorders of the Brachial Plexus: is formed by the cervical nerves C5-C8 and thoracic nerve Th1. The plexus extends from the lower part of the neck to the armpit. From brachial plexus all main nerves to the arm (axillary, musculocutaneus, ulnar, radial, and median nerve) arise.
Most of brachial plexus injuries usually occur in car, motorcycle and sport accidents, during birth, or in bullet or knife injuries. Symptoms and prognosis depend on the nerves involved and extent of an injury: nerve stretching, scar tissue (neuroma), partial or complete nerve rupture or tearing of the nerve from the spinal cord. A limp or paralyzed arm, severe pain and numbness, especially in the neck and shoulders, and weak arterial pulses in the arm are main symptoms. Some brachial plexus injuries may heal without treatment. Many children who are injured during birth improve or recover by 3 to 4 months of age. Treatment of brachial plexus injuries includes physical therapy and, if necessary, surgery.
Thoracic Outlet Syndrome: it is a compression or extension of the subclavian artery or vein, or brachial plexus (nerves), commonly occurring in motorbike accidents, athletes, swimmers, weight lifters, etc. Symptoms include: Muscle wasting at the base of the thumb, numbness, feeling of pins and needles, or pain in the shoulder, armpit, arm or hand (when nerves are compressed) Pale, cool arm with weakened arterial pulse in the arm, numbness and pain (when vessels are compressed) Radiation-Induced Brachial Plexopathy: it follows radiotherapy of the chest, axillary region, thoracic outlet or neck. Symptoms may appear months to years after radiation therapy and include numbness, swelling, weakness or pain in the arm. Broken Shoulder Blade: is the bone in the upper back that connects the collar bone (clavicle) and arm bone (humerus). Broken shoulder blade, usually from a car or motorbike accident, can result in pain, swelling, bruising or deformation of the shoulder blade area, and weakness, numbness or tingling in the shoulder or arm.
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