It could be eczema, but it would be very hard to tell you for sure what it is without giving the doctor a chance to take a look and gather a bit more medical information from you. You can try to cut out lotions and things with fragrance- use Vasaline on the rash and see if that helps. It may be a reaction to something too though- so if you don't see any improvement, get to the doctor to have them take a look.