Hi TarfHead,
I too am curious as to why the improvement is thought to be caused by the magnets.
I hope you don't mind if I suggest a possible way to find out which might help satisfy yourselves somewhat ?
As you say, the eczema is not cured so this means it comes and goes periodically - the only way to know if the magnets are involved in the recessionof her conditions or not is to do a simple test.
a) Record the onset, severity, and recession of the condition with the magnets attached over a number of days.
b) Repeat again without the magnets over a number of days.
c) Repeat the whole exercise at another time i.e the following week or month.
d) The important part - Do the whole exercise again, with something that looks like the magnets but are not magnetic (to allow your niece to think she is wearing magnets). This bit is to counter the placebo effect by checking if she believes the magnets are doing her good, so she is less stressed about the eczema, which in turn might be helping the condition to recede.
During all this try not to comment on whether you think the magnets are working or not, or about her condition. Say nothing about dummy magnets - just tell her they are a new type to try.
Decide on what is defined as a 'significant improvement' for her, and compare to her actual conditions recorded with the magnets on, off and dummy magnets.
If her condition improves significantly corresponding to the presence of the magnets only, then you will know that they do have an effect, which would be great news for her.
NOTE: It might also be more sensible not to do this test if the eczema is always too painful when its full-blown. I would rather not know the result than have her suffer !
In general, I think that there are treatments which work and those which don't, regardless of what we call them (ie conventional, alternative, homeopathic ...). Unfortunately, anecodes are very poor indicators of effectiveness even if it appears to be correct. There are lots of other factors which might cause a condition to recede but anecdotes will not tell us this. Only testing can show if other factors are at work or not.
We expect medicines to be rigourously tested for safety and effectiveness so we should at least expect the same for homeopathic or alternative ones too.