My Lower Leg is Hard and Swollen and Painful After Havig Sclerotherapy 6 Weeks Ago

Please see your physician or go to the ER or Urgent Care.  This may be a clot and it should be taken care of immediately. 

Call your doctor immediately. If it is a small lump it may be localized to one small vessel, it could be a bruise, hematoma but it could be a larger clot with inflammation. If you can't get hold of your doctor you may need to be seen urgently elsewhere, even in an emergency room, to ensure you don't have phlebitis.

One of the more common end results of sclerotherapy for varicose veins is thrombophlebitis. This will manifest itself as hardened superficial veins that are palpable (felt) under the skin. They are superficial because they are palpable. An evaluation with Duplex venous ultrasonography will confirm this and exclude deep vein clots which are not palpable. Deep vein thrombosis may be life threatening. Superficial vein thrombosis is self limited and will improve over time. It is important to follow up with scans to ensure that the superficial vein clots do not extend into the deep veins and cause deep vein clots (deep vein thrombosis).