Common causes of tingling in the index finger of the left hand include radicular cervical spondylosis, carpal tunnel syndrome or localized infection of the index finger.
1. Neurogenic cervical spondylosis: lesions in the cervical spine can compress the cervical nerve roots, inducing tingling in the distribution area of the relevant nerves in the fingers, usually accompanied by numbness.
2. Carpal tunnel syndrome: Wrist injury causes thickening of the transverse carpal ligament, swelling of the tendons in the canal, degeneration of the tissue due to stasis, or degenerative hyperplasia of the carpal bones, which reduces the circumference of the canal, thus compressing the median nerve and causing pain in the fingers, often accompanied by numbness and weakness.
3. Localized infection of the index finger: there are localized infections of the index finger, such as onychomycosis, purulent dactylitis, etc., which cause tingling of the finger due to the increased pressure of localized pus, accompanied by redness, swelling, tenderness, and elevated skin temperature.
Tingling in the left index finger is recommended to go to the hospital in a timely manner, and standardized treatment under the guidance of a physician.