How long does it take for swelling from a black eye to go away? when do i switch from cold compress to hot compress?

Black eye: It depends on how severe the injury was and whether or not you had underlying fracture. The more severe the injury the longer it will take to heal.

Black eye: Depending on the extent of the trauma, black eyes can take weeks to months to fully resolve; it will change colors like a bruise. Cold ice packs help decrease swelling ; further bleeding for the first 4-5 days. Cold ice packs generally help decrease inflammation so it will continue to help with the healing process for the first week. Hot compresses for eyelids am/pm are good daily.