The right side of the neck tendon pain should be alert to fall asleep leading to fasciitis, cervical spondylosis, muscle itself lesions, lymph node swelling and other diseases. 1. Fasciitis: If you keep the same posture for a long time, it may cause the right neck muscles to be in a state of tightness for a long time, which leads to pillow fall, causing right neck fasciitis and the symptom of right neck tendon pain. 2. Cervical spondylosis: due to the degenerative lesions of the cervical spine, it may lead to localized muscle pain and symptoms of cervical fascial pain. 3. Lesions of the muscle itself: when the right side of the neck muscle strains, soft tissue tumors, etc., may produce stimulation of the right side of the neck muscle, resulting in pain. 4. Enlarged lymph nodes: usually caused by tumors, infections, etc. leading to abnormal cell metabolism and reactive hyperplasia. There are several enlarged lymph nodes of different sizes on one or both sides of the neck, when the lymph nodes are enlarged or inflamed, it may lead to the symptom of neck tendon pain. Patients who experience pain in the right side of the neck tendon, if it is difficult to relieve, should go to the hospital in a timely manner, identify the cause of the disease and then actively treat it, so as not to miss the condition.