Symptoms of ulnar nerve entrapment include which of the following?

• A. Tingling in the little finger
• B. Pain in the wrist
• C. Pain at the base of the thumb
• D. Numbness only in the thumb

Answer: (A)

Tingling in the little finger is a hallmark symptom of ulnar nerve entrapment. The ulnar nerve provides sensation to the little finger and part of the ring finger, so when this nerve is compressed, individuals often experience tingling, numbness, or pain specifically in these areas. This symptom arises because the ulnar nerve is responsible for sensory innervation in this part of the hand; thus, any irritation or compression can directly lead to sensations such as tingling.

While other symptoms may be associated with wrist or hand discomfort, the specific tingling in the little finger is most indicative of ulnar nerve issues. Pain in the wrist, pain at the base of the thumb, and numbness only in the thumb do not typically reflect the classic distribution of ulnar nerve entrapment, which primarily affects the areas innervated by the ulnar nerve. Therefore, understanding the anatomical pathways of this nerve helps to clarify why tingling in the little finger is a crucial symptom of its entrapment.