Vitamin B12 Deficiency: This condition is a common cause of tingling sensations in non-diabetic patients. Vitamin B12 plays a crucial role in the synthesis of myelin, the fatty substance that surrounds and protects nerve fibers, facilitating the transmission of nerve impulses. A deficiency can lead to demyelination, resulting in neurological symptoms such as tingling.

Hypothyroidism: This condition can cause tingling sensations due to the metabolic effects on nerve function. Hypothyroidism can lead to slowed nerve conduction velocities and altered nerve function, resulting in symptoms like tingling.
Anxiety or Stress: Anxiety and stress can cause tingling sensations due to the body's "fight or flight" response, which can affect blood flow and nerve function.
Multiple Sclerosis: An autoimmune disease that affects the brain and spinal cord, leading to demyelination and a wide range of neurological symptoms, including tingling sensations.
Peripheral Neuropathy: Damage to the peripheral nerves can cause tingling sensations, and while often associated with diabetes, it can also be caused by other factors such as trauma, infection, or exposure to toxins.

Stroke or Transient Ischemic Attack (TIA): Tingling sensations can be a symptom of a stroke or TIA, especially if accompanied by other symptoms like weakness, facial drooping, or speech difficulties. Prompt recognition and treatment are crucial to prevent long-term damage.
Spinal Cord Compression: Compression of the spinal cord can cause tingling sensations, along with other symptoms like weakness, numbness, or loss of bladder and bowel control. This is a medical emergency requiring immediate attention.
Guillain-Barré Syndrome: A rare autoimmune disorder that can cause rapid-onset muscle weakness and tingling sensations, often following an infection. It can lead to life-threatening complications if not promptly treated.

Sarcoidosis: A condition characterized by the growth of granulomas (inflammatory cells) in various parts of the body, including the nervous system, which can cause tingling sensations.
Lyme Disease: A bacterial infection caused by Borrelia burgdorferi, transmitted by tick bites, which can cause neurological symptoms including tingling sensations.
Heavy Metal Poisoning: Exposure to heavy metals like lead, mercury, or arsenic can cause neurological symptoms, including tingling sensations, due to their toxic effects on the nervous system.
Vasculitis: Inflammation of the blood vessels can cause tingling sensations by affecting blood flow to the nerves.