Hi for last 2 weeks have pain in right armpit radiating down to arm and fingers (feel numb) also feel it in side ribs and back. Had breast ultrasound just 2 months back which was all clear. Visited breast surgeon who said is muscle spasm and gave Myospaz Forte but not much relief. No problem at night but morning as soon activity starts pain comes. Can a muscle strain/spasm last for so long ? No lumps felt in breast or armpit.