Pain under foot (under the 2nd toe)?

After walking quite awhile the other day in my new Puma's I now feel a great pain under my foot where the phalanges and metatarsus meet on the toe right next to the big toe. Specifically, on this picture from Wikipedia (a href="http://upload.wikimedia.org/wikipedia/commons/5/5c/Gray289.png)," rel="nofollow"http://upload.wikimedia.org/wikipedia/co…/a its where the number 2 "body" toe and the number 6 appendage meet. Does anyone know what the problem might be and or how to heel it. Thank you.