mine started on a year long trip I took from North America to South America and I wasn't stressed at all!
but, i was taking anti-malarials and apparently quinnine (sp?) can be a trigger. so stay off the G&Ts!!
actually, it cleared up 100% when pregnant and has never come back as bad tbh.
i went vegan for 9 months and had homeopathy to no effect. however, soy is also a trigger and i replaced all my dairy and animal protein with soy!
i also went dairy free for 3 months and this actually had a great effect. and i mean dairy free - no whey, no lactose etc. it wasn't as hard as i thought it would be. lost a bit of weight to LOL.
since being 6.5 months pg I have probably experienced the worst ever stress of my life (dd now 15 months). i wouldn't actually say it's made my hands/feet any worse tho.
i can definately say that chocolate affects me tho. also i had a patch test and found i am allergic to a chemical found in many cleaning (domestic and personal!) products.
so i try not to eat (much) chocolate and i never use cleaning products without gloves. i also only ever use 1 type of shampoo/conditioner and very rarely use soaps etc.
i find drinking plenty of water helps.
the site i linked to further down has an "alternatives" thread where people post their experiences with things like the Pagano diet etc.
I keep meaning to try a natropath but never have time these days..........