Aspirin is a nonsteroidal anti-inflammatory drug that relieves mild aches and pains, reduces fevers, and turns down inflammation, according to WebMD. It is useful in relieving pain that arises from inflammation-related illnesses such as arthritis, explains Harvard Health Publications.
Aspirin is available over the counter and is appropriate for treating toothaches, headaches, cramps and other types of pain. As an anti-inflammatory, it works by blocking the enzymes that make the chemicals that signal pain, states WebMD. The individual feels less pain when these enzymes are blocked. It also reduces prostaglandins, which are the chemicals responsible for inflammation. This leads to less pain and less swelling.