Tingling fingers can commonly be caused by nerve compression or irritation. One frequent cause is carpal tunnel syndrome, where the median nerve in the wrist is compressed, often affecting the thumb, index, and middle fingers with tingling, numbness, pain, or weakness. Another cause is a pinched nerve elsewhere, such as in the neck or arm, leading to disrupted nerve function and tingling sensations. Other possible causes include vitamin deficiencies (like B vitamins), peripheral neuropathy (nerve damage often linked to diabetes or toxic exposure), autoimmune conditions such as multiple sclerosis or rheumatoid arthritis, infections, medication side effects, and systemic diseases affecting nerves. Temporary tingling can also occur due to pressure on nerves during certain positions (e.g., sleeping awkwardly), causing a "pins and needles" sensation that usually resolves on its own. If tingling persists, worsens, or is accompanied by weakness or pain, it is advisable to seek medical evaluation to determine the exact cause and appropriate treatment. Commonly observed related conditions include carpal tunnel syndrome, pinched nerves, peripheral neuropathy, multiple sclerosis, and vitamin deficiencies.