Ignore the "treatments" for now. The root cause is either gluten and/or glyphosate in flour. Tell her to avoid this poison! Stop eating bread, cake, gravy - anything with flour.

For treatment, many people swear by apple cider vinegar with honey and water. A teaspoon a day.

Some suggest DMSO (3 or 4 books on this subject - read them).

Others say turmeric with black pepper. (I sprinkle it on plain sheeps milk yoghurt along with cinnamon.)

Magnesium chloride (or oxide) 300 mg daily.

Voltarol gel is good for immediate relief but don't use it for more than one week per month. It destroys the kidneys.