I know I always say this, but it could be food allergy. The body isn't happy. Get her to do a detox by removing gluten, dairy, alcohol, wheat, caffeine, processed foods and sugar if possible. Just eat organic meat, loads of veg, some pulses like chick peas, beans... simple food that isn't likely to aggravate her inflammation levels. Cook from scratch. Fast if possible- go for as long as you can with just water to give the body a rest and a chance to fix itself.