Name a common symptom of carpal tunnel syndrome.

Numbness or tingling in the fingers is a hallmark symptom of carpal tunnel syndrome, which occurs due to compression of the median nerve as it passes through the carpal tunnel in the wrist. This nerve is responsible for sensation in the thumb, index finger, middle finger, and part of the ring finger. When it is compressed, individuals often experience a "pins and needles" sensation or a loss of feeling in these areas. This symptom is particularly noticeable at night or when performing activities that require repetitive hand or wrist movements, such as typing or using a mouse, and can lead to further discomfort if not addressed.

In contrast to the correct answer, weakness in the arms is not directly associated with carpal tunnel syndrome; the condition primarily affects the hand and fingers. Swelling in the wrist may occur but is not a defining symptom of the syndrome itself. Pain in the shoulder is unrelated, as carpal tunnel syndrome specifically pertains to issues in the wrist and hand due to median nerve compression.