These fractures are called the “march” fractures, which are hairline cracks within a bone typically overuse from repetitive trauma, such as running. Stress fractures also occur when increasing training intensity or volume or drastically altering the diet. The fracture may be seen on x-ray only after weeks of healing has occurred and bone callus has developed (typically at about 3 weeks). Symptoms will include minimal swelling and no bruising, but developing pain internally in the bone. Typical locations are the metatarsals or the Tibia after a long bout of shin splints. Bone typically takes 10-12 weeks to repair, so this injury takes time to fully heal. Evaluating shoe gear, foot mechanics, training programs and occasionally evaluating bone density for female patients is important. Bone is the one body tissue that heals just as strong as prior to the injury.