Usually, it's damage from a physical injury or disease. 1  Cancer and other tumors can cause nerve pain. 2  HIV can cause painful nerve damage. 3  Diabetes is a common cause of nerve damage in the U.S. Over time, high levels of glucose in the blood (blood sugar) can injure the nerves.
Re: Title on spine. Minimum page count is 140 pages, according to CS. I have one book with a total of 158 printed pages and 2 blank pages that has a printed spine. I added 1/16 inch on each side of the spine to keep it from bleeding over onto the front or back covers. Worked perfect.
a young adult book is usually 150-300 pages long. that is the common length. however, books can vary in page length. For example, Harry Potter is around 500-1000 pages long. and Twilight was about 300-500 pages long. so it all depends. as long as the novel you are writing centers around concepts/themes for young adults then it doesn't really matter what the length is. Usually young adult books are 200 or 400 pages.