Sudden itchy feet with small blisters phenomenon, consider and mosquito bites, fungal infections, eczema and other factors related to the choice of glycerine lotion, antifungal drugs, antihistamines and other drugs for relief. 1. Mosquito bites: If it occurs in the hot summer, suddenly itchy feet accompanied by the phenomenon of small blisters, need to be highly suspicious of the possibility of mosquito bites, can be applied through the external use of glycerine lotion, can play a role in stopping itching convergence. 2. Fungal infections: when there is a fungal infection of the foot, can also cause sudden itchy feet, accompanied by small blisters, you can choose clotrimazole, ketoconazole, econazole and other antifungal drugs for treatment. 3. eczema: sudden itchy feet with small blisters, may also be related to eczema, local use of lactic acid or boric acid wet compress, play the role of itching astringent, with oral antihistamines such as chlortetracycline, cetirizine to alleviate the symptoms of itching. Suddenly itchy feet with small blisters may have other reasons, it is recommended to the hospital if necessary, clear reasons, follow the doctor’s instructions for treatment, do not self-medication.