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.
The typical range is 35-65 pages for a chapter book, 45-90 for a low-middle-grade, 90-120 for a middle-grade, 150-200 for a young, young adult, but these are just averages. Some publishers have series of books with a maximum of pages. For example, Hyperion chapter book manuscripts must currently be 2,500-5,000 words maximum. If you have questions about specific series of books, do some research -- read the books, check the catalogue, contact the publisher, etc.