Tingling in Hands and Feet: 6 Common Causes Explained

That "pins and needles" sensation in your hands or feet is usually caused by temporary pressure on a nerve — like sitting with your legs crossed. But when tingling becomes frequent or persistent, it deserves medical attention. Common Causes 1. Carpal Tunnel Syndrome: Compression of the median nerve in the wrist causes tingling, numbness, and weakness in the thumb, index, and middle fingers. It is especially common in people who perform repetitive hand motions. 2. Vitamin B12 Deficiency: This vitamin is essential for nerve health. Deficiency causes progressive peripheral neuropathy — tingling that starts in the feet and hands and can progress to balance problems. Vegetarians and older adults are at higher risk. 3. Peripheral Neuropathy from Diabetes: High blood sugar damages small blood vessels that supply nerves, causing burning, tingling, and numbness that typically begins in the feet and progresses upward. 4. Cervical or Lumbar Disc Issues: Herniated discs can compress nerve roots in the spine, causing radiating tingling into the arms (cervical) or legs (lumbar), often on one side. 5. Anxiety and Hyperventilation: Rapid breathing during anxiety episodes reduces carbon dioxide levels, causing tingling in the hands, feet, and around the mouth. 6. Thyroid Disorders: Both hypothyroidism and hyperthyroidism can cause peripheral neuropathy symptoms, including tingling and numbness in the extremities. When to Worry Seek medical evaluation if tingling is persistent, progressive, affects one side of the body suddenly, or is accompanied by weakness, vision changes, or difficulty speaking — these may indicate stroke or multiple sclerosis.