How do you know you have a “blocked lymphatic vessel” and not just a turgid vein or artery? If it is not inflamed or painful, it is probably harmless. Sometimes these can be massaged out and sometimes not. Do some reading in the Injuries Forum; see if you come up with a condition there that matches yours and give us a link to it so we have a better idea what you are talking about.
Do no PE for a day or two and the doughnut will likely disappear. I don’t know anything about JES extenders but it sounds like that is the culpret with the doughnut. It may be possible to wrap to prevent it; guys who use them may be able to tell you.