Carpal Tunnel Syndrome: This condition is a common cause of numbness and tingling in the fingers, particularly in the thumb, index, and middle fingers, due to compression of the median nerve at the wrist. The symptoms often worsen at night or with certain activities.

Peripheral Neuropathy: This can cause numbness and tingling in the fingers due to damage to the peripheral nerves, often associated with diabetes, alcohol abuse, or vitamin deficiencies.
Cervical Radiculopathy: Compression or irritation of the nerve roots in the cervical spine can lead to numbness and tingling in the fingers, depending on which nerve root is affected.
Ulnar Nerve Entrapment: Compression of the ulnar nerve at the elbow or wrist can cause numbness and tingling, particularly in the little and ring fingers.

Multiple Sclerosis: Although less common, multiple sclerosis can present with numbness and tingling in the extremities, including the fingers, due to demyelination of nerve fibers in the central nervous system.
Vitamin B12 Deficiency: A deficiency in vitamin B12 can lead to neurological symptoms, including numbness and tingling in the fingers, due to its crucial role in the synthesis of myelin.
Hypothyroidism: Severe, untreated hypothyroidism can cause peripheral neuropathy, leading to symptoms such as numbness and tingling in the fingers.

Syringomyelia: A rare condition characterized by the formation of a fluid-filled cavity within the spinal cord, which can expand and damage the spinal cord, leading to numbness and tingling in the fingers.
Guillain-Barré Syndrome: An autoimmune disorder where the body's immune system mistakenly attacks part of its peripheral nervous system, which can lead to numbness and tingling, among other symptoms.
Lyme Disease: In its later stages, Lyme disease can cause neurological problems, including numbness and tingling in the fingers, although this is relatively rare.