Qwik Hot Instant Hot Packs are designed to generate heat through chemical reactions that occur once the package is punctured. These packs can increase the temperature up to 21 degrees Celsius from room temperature and provide warmth for up to 15 minutes. They offer effective relief from pain and swelling caused by minor injuries, bruises, cuts, muscle aches, sprains, and headaches. These hot packs are ideal for emergency situations when immediate soothing and comfort are needed.