Please share some more information: any medical problems? Taking any meds? Any allergies?
There are several possible causes of this and many of them are treatable which is good news. These include skin conditions such as eczema and fungal infections that can be easily differentiated by having your doctor examine the feet. Topical creams can be used depending on the cause and should help your symptoms quickly. Please see a dermatologist at your earliest convenience to evaluate for appropriate treatment and please let me know if you have more questions.