If matting persists after 3 years, should I learn to live with it?

Post sclerotherapy matting is sometimes difficult to treat.  Often times matting will spontaneously resolve over 18 months.  Matting 3 years down the line may be permanent.  I would certainly reevaluate you with a venous ultrasound to look for not only feeders to the matted area but also underlying venous reflux which could contribute to the venous hypertension.  Some topical lasers may help and you also need to distinguisn between matting and staining. See a vein specialist.

Capillary matting following spider vein sclerotherapy is not an uncommon occurrence, but the good news is there are treatment options available. Lasers can be used to improve the appearance, as well as non-laser devices such as VeinGogh. Typically, when matting appears, there is a feeding vein, or reticular vein, that is still supplying the region, and this must also be shut down to prevent recurrence or persisitence. My suggestion would be to see a vein specialist to review your status, and the ongoing treatment options.