The difference between eczema on the feet and foot odor is not obvious in the form of the rash; both can present with erythema, papules, vesicles, oozing, crusting, and itching. However, foot odor can often appear as maceration and whitening between the toes, which is one of the points of differentiation. The main point of differentiation is by fungal testing. If the fungal microscopy is positive, it is foot odor; if it is negative, it is eczema. In addition, there is a special case is the fungal microscopy is negative, but can not exclude the case of foot fungus, because the fungal microscopy is sometimes artificial to see, if the fungal mycelium is particularly small can not be completely detected, you can use topical trimethoprim ointment. There are differences in treatment and lifestyle between the two, eczema needs anti-allergy treatment and foot fungus needs anti-fungal treatment.