   Answer   It could be anything from a harmless cyst to a lymph node. Our lymph nodes are everywhere in … our bodies and in some individuals these lymph nodes are working harder as a filtering system in your body. My girlfriend had two swollen lymph nodes under her chin and they were removed and not cancerous!f the inflamed muscle is inflamed because of an infection, then yes, it could be a cause of the node's appearance.     If on the other hand, you just pulled the muscle, then it is highly unlikely to be infected, so it would expected that there would be another cause for the lymph node.