A swab is a small, thin piece of absorbent material, typically made of cotton or synthetic fibers, attached to a handle or stem. It is used to collect, apply, or remove liquids or other substances from a surface or object. Swabs are commonly used in a variety of settings, including medical and scientific laboratories, industrial and manufacturing environments, and households. They are also commonly used in cosmetics and personal hygiene products. Swabs may be single-use or reusable, depending on the intended application. They are available in various shapes and sizes to suit different needs, and may be treated with disinfectants or other agents for specific purposes.

For external use only, to clean wounds and before injection, as anti-septic.