Hi Dear !! Thanks for your query to HCM . Read and reviewed your query and health concerns. IN the given situation of Yours, seem to suffer from- Fibromyalgia from long Neuro-Vascular Compression in left arm and elbow. It does not seem to be Saturday night palsy,as you dont have numbness, but pain which is increasing from use. Its mostly the pain in muscles around left elbow and biceps,which seems to have intensified,after getting up. This pain is from Fibromyalgia and is from Vascular congestion and resultant lactic acidosis-damage to muscles around left elbow and biceps. This pain will resolve on its own= with rest to the part and would take 1-3 days,as nothing serious is there. Do s - Hot fomentation to the left elbow and biceps, to increase muscle circulation. Infra-Red radiation And Voltaren gel -locally to control unbearable pain. Other causes need to be ruled out-by Consults with Surgeon and proper investigation and treatment. This plan would reduce your dilemma from pain in left elbow and biceps 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 to 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