The pictures look like matting but since you have persistence of the problem and since you had a post sclerotherapy complication, I would recommend a full venous evaluation with a venous reflux exam. I would also look for underlying reticular or feeding open vessels. You should see a...
Leave it alone. What you are showing is the tip, not the base. Nevertheless, if it is not causing problems there is no need to address it. If it does, seek a urologist,