There are many possible causes of itchy feet with blisters. Among the most common causes are fungal infections, such as athlete's foot, and poorly fitting shoes that irritate the skin. An individual may also develop these symptoms because of an allergy to something that has touched his feet or that he has consumed. In some cases, a chronic skin condition may even prove to be the culprit.

One of the most common causes of itchy feet with blisters is a fungal infection. For example, a person may have these symptoms when he develops a condition called athlete's foot, which is marked by such symptoms as itchiness; burning sensations; cracking skin; thickened, yellowing toenails; and itchy blisters. This condition is contagious and thrives when a person's feet are moist, such as when they are in overly tight shoes or sweat a good deal. A person can also contract the fungal infection from surfaces, such as shared towels and shower floors in gyms. It is even possible to catch the condition from wearing an infected person's shoes.

In some cases, a person will develop itchy feet with blisters because his shoes do not fit well. For example, when a person's shoes and socks fit too tightly or are made out of an irritating material, they can prevent the proper flow of air and literally rub one's skin the wrong way. When this occurs over a significant period of time, blisters are often the result. Sometimes these blisters itch, but they can cause pain as well. Eventually, the blisters may become infected, and if left untreated can lead to even more discomfort.

It is also possible for an allergic reaction to cause itchy feet with blisters. This can occur when a person is allergic to the material of which his shoes or socks are made or to a substance that has touched his feet, such as a type of soap or lotion. In some cases, however, a person might have an allergic reaction that involves his feet after consuming a food or medication that stimulated an allergic reaction. Often, discontinuing the use of the allergen helps relieve the irritation and blistering.

An individual might also develop itchy feet with blisters because of a chronic skin condition. For example, a person may develop these symptoms when he has eczema, which causes inflamed itchy skin that can blister, crack, and bleed. A doctor will usually prescribe oral or topical medications for dealing with itchy feet with blisters that are caused by a chronic skin condition.