Metatarsal stress fracture- 13 weeks in boot, x-ray shows not healed, sore, swelling- stay in boot, alternatives?

Possible nonunion: At 13 weeks, consider fracture nonunion. An MRI scan can determine if any healing has occurred. Reasons for a nonunion may be motion at the fracture or an underlying metabolic issue, such as osteoporosis, hormonal imbalance, or Vitamin D/calcium/magnesium deficiencies. Further medical evaluation can help determine why the fracture is not healing. Surgery may be needed depending on which toe it is.