What immediate first aid reduces swelling after a mild spider bite?

Applying a cool compress, such as ice wrapped in a cloth

For minor, localized irritation following a spider bite, immediate first aid focuses on reducing localized discomfort and swelling. After thoroughly cleaning the area with soap and water, applying a cool compress, often ice wrapped in a cloth, serves to constrict blood vessels and minimize the inflammatory response at the site. While acetaminophen or ibuprofen can address pain and antihistamines can control itching, the physical application of cold directly manages the swelling component effectively. Topical corticosteroids are mentioned as a treatment for *persistent* inflammation, not usually the immediate first step after initial washing and cooling.