Upper arm pain refers to the pain that is experienced between the shoulders and the elbows, either in one arm or in both the arms. There are a number of arm pain causes, varying greatly in the kind of effect they can have on the body.
Novel: anything over 40,000 words. However, 40,000 words is actually pretty short for a novel. Generally, 50,000 would be considered the minimum word count, and ideally a novel should be over 70,000 words. On the upper end, a novel over 110,000 words is considered an epic. That's the level where publishers may suggest dividing a story into multiple volumes.
Epic Novel - 150K+ (Think Lord of the Rings, Gone With The Wind, etc.). Manuscript page count is relatively unimportant, since it is word count that seems to drive the whole process. If you're using courier new font, divide each of the above by 250 to get the number of double-spaced pages you would submit. Actual publication pages will vary depending upon how the book is typeset.