Carpal tunnel syndrome (CTS) is a condition that arises when the median nerve becomes compressed as it travels through the bony tunnel made up of the eight small carpal bones of the wrist. Its symptoms include pain, numbness, and tingling in the thumb, index, middle, and thumb-side half of the ring finger. If the pressure is great enough, weakness in grip and pinch strength can occur as well.

There are many conditions or factors that contribute to and/or cause CTS, which can complicate its diagnosis and treatment. Some of these include: diabetes, obesity, pregnancy, birth control pills, hypothyroid (low thyroid function), arthritis, smoking, alcohol abuse, poor nutrition, being female (due to wrist size and/or hormonal shifts), bony abnormalities (such as spurs, misalignment of the carpal bones, and tunnel shape), aging, and certain occupations (heavy manual labor, vibrating tools, high repetitive tasks, firm gripping requirements, food servers, dental hygienists).

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