The causes of small blisters on the feet are allergies, fungal infections, chicken pox, etc. Allergies on the feet will appear itchy skin, itchy skin will appear after scratching with hands, small blisters will appear on the skin of the feet, and accompanied by obvious itching; foot odor on the feet is mainly caused by fungal infection, there will be small blisters on the feet when there is a fungal infection, mostly distributed in the foot crevice and toe area, the location is relatively deep, there is obvious itching high, the itching is aggravated after preheating, relatively serious in summer. More serious. It is recommended to use localized miconazole nitrate cream or terbinafine hydrochloride cream for local application; small blisters may also appear on the face of patients with chicken pox, which gradually become larger and have an itchy sensation. It is advisable to wash your feet every night to keep them clean and dry, and avoid scratching them with your hands to avoid skin ruptures that can lead to local infections.