There are two most common possibilities for the appearance of small blisters on the fingers, accompanied by significant itching symptoms: First, there is eczema and allergy of the hands. Second, there is a possibility of ringworm, commonly known as tinea cruris, which is caused by a fungal infection. If there is finger contact with something suspicious before the symptoms appear, such as washing hands or clothes with soap or the like, this may irritate the skin and cause allergy or localized eczema with blisters accompanied by itching. If there is obvious foot odor and there has been significant scratching with the toe crevices in the recent past, there is a possibility of contracting tinea pedis, also called ringworm, as a result. If it is difficult to differentiate from the medical history, you can go to a regular public hospital and register with the dermatology department to see the patient in person, take some localized dander and check the fungal microscopy to effectively differentiate.