NSAIDs, or nonsteroidal anti-inflammatory drugs, are a class of medications commonly used to reduce inflammation, relieve pain, and decrease fever. They work by blocking the production of certain chemicals in the body that cause inflammation. NSAIDs are commonly used to treat conditions such as arthritis, menstrual cramps, headaches, and minor injuries. However, they can have side effects such as stomach ulcers, kidney damage, and increased risk of heart attack or stroke, so it is important to use them as directed and consult with a healthcare professional before using them long-term.