Biceps tendinopathy is a common cause in shoulder-pain symptoms. The major mechanism is overuse of the biceps muscles. The long-term accumulated and poor repaired trauma causes myofascial trigger points in the related muscles.

We will conduct the randomized, single blind experiment to evaluate the immediate, short-term, and long-term effect of DN.

Biceps tendinopathy is a common cause in shoulder-pain symptoms. The major mechanism is overuse of the biceps muscles. The long-term accumulated and poor repaired trauma causes myofascial trigger points in the related muscles. Common symptoms are pain in the anterior shoulders and radiating pain in the biceps. Pain can be further elicited with lifting, pulling and repetitive overhead activity. Therefore, it can have a major impact on the patient's activity of daily life.

The investigator performed dry needle (DN) treatments with acupuncture needles. Stimulating the effected muscle , the investigator move the needle forward and backward several times. Muscle twitch may occur by our procedure. The pain caused by myofascial trigger points can be decreased effective simultaneously. So far, there is no solid research or clinical trial to evaluate the efficacy of the treatment yet.

The investigator will conduct the randomized, single blind experiment to evaluate the immediate, short-term, and long-term effect of DN. Outcome measures include visual analog scale, shoulder pain and disability index, pressure pain threshold, pain-free grip test, muscle tone changes and ultrasonographic evaluation of biceps peritendinous effusion.

Inclusion Criteria:

1. Subjects older than 20 years of age who can cooperate with the experimental volunteers.
2. Suffering from biceps tendon lesions for more than one month, and subjective pain intensity (VAS) greater than 5 points.
3. There is a local tender point in front of the shoulder, and the shoulder joint pronation test can induce pain.
4. Under soft tissue ultrasound, the thickness of Biceps Peritendinous Effusion (BPE) on the affected side of the biceps tendon is greater than 1 mm.

Exclusion Criteria:

1. There are contraindications to general treatment, such as serious medical problems, recent serious trauma, or pregnant women.
2. There has been a history of drug abuse (including excess alcohol) that affects pain assessors.
3. Have received shoulder, neck or upper back surgery.
4. People with central or peripheral nerve disease.
5. Cognitive impairment, unable to cooperate with the experimenter.
6. Patients currently receiving other treatments for Biceps tendinopathy