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.
Now you have your wordcount estimate, which is the standard way to talk about a book's length. Contemporary novels tend to go about 80-100k, fantasy gets to be a bit longer, while YA fiction tends to cap at 75k. If you have 200 words on every hand-written page, you'll have a half-novel of 40,000 words. I have a novella of 40k that measures 137 pages on a 6x9 paperback. (292 words per page.). Most fiction paperback books average about 250-350 words per page. The Hobbit is about 95,000 words. My paperback copy of The Hobbit is 303 pages, so with a bit of math we find it clocks 313.5 words a page. You can also get a feel for how type, margins, and dimensions change the page count by googling some of the well known titles on your shelf.