My daughter was the same, she got worse when we moved into a house with (sick building syndrome) and seemed to waste away. I took her to a classical homeopath and she was very low in phosphorus (a necessary element) and has since been cured. But dont just buy remedies if you are thinking about homeopathy as a full study has to be done on the person, best to go in person. We also moved, don't live in a house with a water running underneath it.
ltbh