From the Research
No, shoulder muscle knots and tension cannot cause palpable lymph nodes in the elbow. Shoulder knots, also known as myofascial trigger points, are areas of tightness in the muscles that can cause pain and discomfort, but they do not affect the lymphatic system 1. Palpable elbow lymph nodes are typically caused by infection, inflammation, or other conditions affecting the arm, hand, or nearby tissues that trigger an immune response. These lymph nodes become enlarged when they're actively fighting infection or responding to injury in the areas they drain. Common causes of enlarged elbow lymph nodes include cuts or infections on the hand or forearm, cat scratch disease, or more rarely, certain cancers. If you're experiencing palpable elbow lymph nodes, it's essential to consult with a healthcare provider for proper evaluation, especially if accompanied by other symptoms like fever, unexplained weight loss, or if the nodes are painless, firm, or have been enlarged for more than two weeks.
Some studies have investigated the relationship between lymphedema and shoulder function, but these studies do not support the idea that shoulder muscle knots and tension can cause palpable lymph nodes in the elbow 2, 3, 4. For example, a study published in 2016 found that physical therapy combined with manual lymphatic drainage can improve shoulder function and reduce lymphedema in breast cancer patients with axillary web syndrome 3. However, this study does not provide evidence that shoulder muscle knots and tension can cause palpable lymph nodes in the elbow.
In terms of shoulder and elbow range of motion, a systematic review published in 2018 found that unimpaired participants used up to full elbow flexion (150°) in personal care, eating, and drinking tasks, and approximately 130° of shoulder flexion and abduction was necessary for various activities of daily living 5. However, this study does not address the relationship between shoulder muscle knots and tension and palpable lymph nodes in the elbow.
Overall, the evidence suggests that shoulder muscle knots and tension are not a cause of palpable lymph nodes in the elbow, and that other factors such as infection, inflammation, or cancer are more likely to be responsible for enlarged lymph nodes in this area. Therefore, if you are experiencing palpable elbow lymph nodes, it is crucial to consult with a healthcare provider for proper evaluation and treatment.