Hi!
Since you have pain along the whole arm, in all probably there is injury or pressure to the nerves in the armpit or at the elbow. If you are undergoing physiotherapy, then exercises must not cause further injury to the nerves in the armpit or at the elbow. Also, it could be a muscle injury like bicep injury. I suggest you give the arm rest (as physiotherapy is worsening the pain), take anti-inflammatory pain killer and some vitamin B. Use a slig to give arm support. Meanwhile try and find out your options for diagnosis and treatment. Take care!
The medical advice given should not be considered a substitute for medical care provided by a doctor who can examine you. The advice may not be completely correct for you as the doctor cannot examine you and does not know your complete medical history. Hence this reply to your post should only be considered as a guiding line and you must consult your doctor at the earliest for your medical problem.
Thank you very much Dr. Mathur. My husband should be eligible for medical insurance at the beginning of next year, so I am hopeful to see a doctor for a proper diagnosis. I do have a pain under my armpit sometimes and in my elbow. It has been a year and I am worried waiting any longer could make this chronic. Your message makes me feel more comfortable though that waiting may not be too bad.
Thank you.