I have had severe bouts with ataxia off & on for approx. 6 years. At first I was told it was caused by a virus. In 1997 I was tested by an environmental specialist and told I have multiple chemical sensitivity. I develop tremors, headaches, joint pain and ataxia from perfumes, paint, new carpet, etc. just to name a few. I'll will be more than happy to share any information I have received from the specialists.