question: Hi I have read  many of the above posts and I can relate to the tingling, nerve twitching over any random area of my body at any unforeseen times. I have been advised several years ago that I have chemical sensitivity as I suffered burning pain after using a chemical formulation of body wash. I have had to go soap free washes. I have also had sensitizing to Pyrethrum a few years ago. The ingredient found in fly sprays. I live in a rural area where every farming season there are toxic chemicals used on the farming ground all around us and it drifts into our homes and vehicles when driving. Over the last months I have developed a major problem with the dust that settles in my home after I have had a window open. I have strange sensation to my skin, twitching, dryness, nerves jumping randomly anywhere, itching, lowered concentration and I feel like i need to have a shower. If I do have a shower these sensations go away until I have contact again. I relate to Thelma D's symptoms also Leslie Lyon and Kenneth Smith. I do not drink alcohol, I am gluten intolerant, and can not use foods with additives. I am also not low on B12 vitamin or Vitamin D, as I have had mine checked recently. I am pretty certain that all these problems are chemical related as our land is being filled with it every where. I do not suffer from anxiety problems. Although I do feel unwell when I have skin irritation and I just feel sad. I have been to many doctors and no one can answer my problem. They are unaware of the cause and tend to imply anxiety. I know that that is not the case. Thanks for this site. It's interesting reading how many people have the same symptoms as me. I thought I was the only one.Susanne M