about 9/12 ago , I started to have pain under my right arm . I thought certain clothes pinched my armpit as it as to tight. Therefore, I lost weight but still have the same pain. A few weeks ago, a fell on my R- shoulder, and this has aggravated the discomfort , and also now sending pain from the Deltoid Muscle down to my forearm. Someone said it is a frozen shoulder especially as I had a frozen shoulder in the left shoulder for almost 3 years, which has almost gone in the last 6/12. Any ideas?