Painkillers, also known as analgesics, are medications designed to relieve pain. They work by blocking pain signals in the brain or by reducing inflammation in the body. Common types include acetaminophen, ibuprofen, and aspirin, each with different uses and side effects. These medications can be over-the-counter or prescription-based, depending on their strength and potential for misuse. While effective for managing pain, it's important to use them as directed to avoid risks such as addiction or adverse reactions. Always consult a healthcare professional before starting any pain relief regimen.