Peripheral Neuropathy: This is the most common cause of tingling feet, often due to diabetes, but can also be caused by other factors such as vitamin deficiencies, alcohol abuse, or certain medications. The symptoms typically start in the feet and can progress upwards.

Vitamin B12 Deficiency: A deficiency in vitamin B12 can cause neurological symptoms including tingling in the feet. This is often seen in individuals with poor dietary intake or malabsorption issues.
Hypothyroidism: Some patients with hypothyroidism may experience tingling sensations in their feet due to the metabolic effects of the condition on nerve function.
Multiple Sclerosis: Although less common, multiple sclerosis can cause tingling sensations in the feet as part of its neurological manifestations.

Guillain-Barré Syndrome: An autoimmune disorder that can cause rapid onset of muscle weakness and tingling, starting in the feet and ascending. It's a medical emergency requiring prompt treatment.
Spinal Stenosis or Herniated Disk: Compression of the spinal cord or nerve roots can cause tingling in the feet. This condition may require surgical intervention and can lead to significant disability if not addressed.
Vasculitis: Inflammation of the blood vessels can impair blood flow to the nerves, leading to tingling sensations. Certain types of vasculitis can be life-threatening if not treated promptly.

Charcot-Marie-Tooth Disease: A group of inherited disorders that affect the peripheral nerves, leading to tingling and muscle weakness in the feet and legs.
Amyloidosis: A condition characterized by the deposition of abnormal proteins (amyloid) in various tissues, including nerves, which can cause tingling sensations in the feet.
Sjögren's Syndrome: An autoimmune disorder that can affect the nerves, among other tissues, leading to tingling sensations in the feet, though this is less common compared to its other manifestations like dry eyes and mouth.