It's the second week of wearing my new trainers and I am having problems with the left one. After 20 minutes my 3 middle toes start to go numb, then I get an unbearable pain under those toes. I had to stop my run today because I couldn't bear the pain! Also I have had a sore ankle, shin and calf in that leg. I never had problems with my old trainers and I am not doing anything different. The trainers are Asics Cumulus 18, advised by Sweatshop after a foot analysis. Any advice would be appreciated please.