Small itchy blisters on the heels may be caused by diseases such as blistering tinea pedis, foot eczema, and palmoplantar pustulosis. 1. Blistering tinea pedis: When there is a fungal infection in the feet, it can lead to the occurrence of blistering tinea pedis. In addition to blisters on the heel and toe joints, it can also be accompanied by intense itching symptoms, especially at night when the symptoms are most obvious. 2. Foot eczema: When the soles of the feet are allergic and irritated, it is easy to cause foot eczema. Not only can it lead to the appearance of small blisters and itchy symptoms, but also lead to the appearance of red pimples on the skin of the feet. Heel small blisters are very itchy may also have other reasons, should pay attention to foot hygiene, to wash feet, change shoes and socks, avoid scratching the itchy place, so as to avoid blisters broke, resulting in infection. At the same time, it is recommended to go to the hospital dermatology department to clarify the cause of the disease, under the guidance of the doctor for targeted treatment.