Abdominal pain can be caused by many conditions. However, the main causes are infection, abnormal growths, inflammation, obstruction (blockage), and intestinal disorders. Infections in the throat, intestines, and blood can cause bacteria to enter your digestive tract, resulting in abdominal pain.
Most obviously, a hyphen is used to indicate that a long word has been broken off at the end of a line: You should avoid such word splitting whenever possible. If it is unavoidable, try to split the word into two roughly equal parts, and make sure you split it at an obvious boundary. Do not write things like.
The general trend is that over time, a construction starts out as two words, eventually becomes hyphenated, and finally ends up as one word. I.e., lawn mower becomes lawn-mower becomes lawnmower. Me, I prefer it as two words, but maybe that's because I'm an old fart and resistant to change.