NSAIDs are most commonly used as an analgesic, taken to relieve pain. NSAIDs are considered, in general, to be safer than acetaminophen (sold as Tylenol in the US); in particular, larger doses are less likely to cause permanent liver damage. However, long-term high-dose treatment may be inadvisable. They have also been linked to a higher risk of stomach ulcers.
For chronic (persistent) pain, seek medical advice.