How long does the sensation last? Any swelling or redness in those areas? And, I know that looking on the internet for answers to symptoms can give you some scary information, what serious diseases did you learn of, so that I can try to ease your concern about having one of those?
The sensations usually last throughout the day with some days being less noticible and other days more so. There has been no swelling that I can visibly detect. I have read about such allergies to sodium lauryl sulfate (found in many toothpastes), and various other chemicals such as anisyl alcohol, benzyl alcohol, etc. (found in perfumes, etc.). I have also found references to pinched nerves, tetany, diabetes, raynaud's, etc.