Dear subscribers, let me explain the wisdom of the Donguibogam once more in the language of modern science. The primary culprit behind the aforementioned arm numbness, paresthesia in the hands, and shoulder pain very often originates in our neck, namely the cervical vertebrae. Modern medicine primarily diagnoses this condition as cervical disc herniation, which refers to a state where the intervertebral disc—serving as a shock absorber between our vertebrae—deviates from its original position and exerts pressure on surrounding nerves.
Our neck contains seven cervical vertebrae, with resilient discs positioned between them. This disc is largely composed of a soft, cartilage-like nucleus pulposus surrounded by a tough, fibrous anulus fibrosus. As we age, degenerative changes take place where the disc loses moisture content and elasticity. When poor posture, repetitive stress on the neck, or sudden trauma are added to this, the anulus fibrosus tears and the nucleus pulposus is pushed outward, much like jelly-like contents leaking out from a torn outer shell.
This protruding disc exerts pressure on the essential nerves running from the neck to the arms and hands, known as cervical nerve roots. Like electrical cables, nerves convey commands from our brain to our limbs and send sensory information from the limbs back to the brain. When these cables are compressed by a disc, normal signal transmission is disrupted. As a result, various symptoms arise according to the region innervated by that nerve.
The most common symptom is radiating pain. A sensation of pain starting from the neck or shoulder shoots down the arm into the fingers, sometimes accompanied by tingling or burning sensations. In addition, paresthesia causes numbness or sensory blunting in the arms or fingers, and in severe cases with prolonged nerve root compression, it may even accompany motor weakness where strength leaves the muscles of the arm and hand. Problems arise such as finding it difficult to use chopsticks or frequently dropping objects.
When these symptoms occur, we verify which nerve region is compressed through a neurological examination, and accurately diagnose the condition of the disc via imaging studies like x-rays or magnetic resonance imaging. An x-ray reveals bone alignment and degenerative changes, while magnetic resonance imaging precisely demonstrates the degree of disc herniation and presence of nerve compression.
Treatment usually begins with conservative approaches. Focus is placed on strengthening the muscles around the neck and correcting posture through pain-relieving medication such as anti-inflammatory analgesics and muscle relaxants, nerve injections, and most importantly, physical therapy and rehabilitative exercise. In severe cases or when conservative treatment fails to provide relief, surgery is also considered.
Ultimately, what the Donguibogam describes as qi and blood stagnation can be explained in modern medicine as nerve compression caused by a disc, and deficiency of nutritional supply can be understood as diminished nerve function and circulatory disorder. In other words, it is a state in which our body's critical pathways are physically obstructed, preventing vital energy from flowing properly. Therefore, if you are experiencing arm numbness and paresthesia in your hands, you should check whether this might be a signal sent by your neck. Our body is constantly sending us signals of health. Tuning in and listening carefully to those signals without missing them is the true beginning of a healthy life.
