hi, thanks for visiting healthcaremagic if your daughter was diagnosed with osteoporosis,hopefully she must have been on treatment for this. a person with osteoporosis can have a broken bone with trivial trauma but you have not mentioned history of any kind of injury please do the following: 1. apply ice packs 4-5 times a day 2. give rest to the affected part. 3. avoid walking, if necesary, walk on heel and don t put pressure on toes 4. keep leg elevated.while sitting keep it on a table, chair or stool. while sleeping keep it elevated on a pillow 5. use mild antiinflammatory like naproxen or ibuprofen. it should resolve in 4-5 days. wish you a speedy recovery thank you