Thanks for the query to H.C.M. Forum.
In my opinion there develops thrombophlebitis
of vein in elbow.
Since you stated that swelling has reduced so this is nice thing.
Apply or massage heparin
ointment twice in way very gently .
Ice pack and use anti inflammatory drugs with serratiopeptidase
after consultation with a primary care
Rest will also be helpful.
Good luck. Dr. HET