The time an injury takes to heal depends on how severe the injury is. However, it will usually take anywhere from a couple of days to several weeks. Keep cool compresses on … the area to reduce swelling as well as taking Ibuprofen. Also, use warm compresses to help with pain.he femur can take a lot of damage without breaking, but that damage would still have to heal. Connective tissue -- depends on the injury and how well you treat it (which would typically include physical therapy).