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 average volume length is 180 pages (which including omakes or interstitial pages can mean 165-170 actual chapter pages). 4komas have a slightly different format -- they print in a larger format more similar to US graphic novels, and are around 120-140pgs each.