Hi Dear !! Thanks for your query to HCM . Read and reviewed your query and health concerns. IN the given situation of Yours,You seem to suffer from-?TOS(Thorasic Outlet Syndrome)-V-(Venous)with axillary/subclavian vein Thrombosis ( Paget/Schrotter Disease) . Other causes-as Pectoralis Minor Syndrome(PMS)/SOL(Space Occupying Lesion) in Mediastinum etc. CT Chest and physical examination with Orthopedic Surgeon and Chest Surgeon would fix the diagnosis. Cause of pain on extension of biceps- This pain is due to thrombophlebitis in axillary/subclavian veins in to which basilic and cephalic veins along biceps drain in to. This is due to Subclavian / n / or Axillary Vein compression from narrowed collar bone space and or/ from pectoralis minor compressing axillary vein(PMS-Pectoralis Minor Syndrome) So stop these medicines and Consult with Chest and Vascular Surgeon and get USG with Colour Doppler Study to assess the UEDVT(Upper Extremity Deep Vein Thrombosis) Physiotherapy and blood thinner with Per cutaneous Direct Catheter thrombolysis is needed. Hope this would help you to plan further of this complex illness of yours. If need be, update any health issue 24 x 7 by a direct question tod ME, at following HCM link- Dear, if satisfied,Don t forget to close this query with YOUR pleasing feedback comments to rate this reply and service, to boost the morale of incoming Emergency patients like YOU, at HCM services. If you want to update more details and ask more update queries , You are most Welcome herewith !! Good Day!! Wishing Good Healthy Life in time to come!! Dr.Savaskar M.N. Senior Surgical Specialist M.S.Genl-CVTS