Feet are very itchy and blisters appear when they are scratched, consider the following three occurrences: 1. It may be palmoplantar pustulosis, the cause of which is unclear and may be caused by factors such as immune disorders or genetics. In clinical treatment, you need to take oral compound glycyrrhizin capsules, 3 times/day, 2 capsules/time, and apply topical halomethasone ointment, 2 times/day. And you can apply wet application of compound cypress jock itch applicator, 2 times/day, 20 minutes/time. 2. Consider eczema. It is a good idea to take a look at the website and see what you can do. It can be treated with oral levocetirizine hydrochloride capsules and topical dinaide cream. 3. Tinea pedis is mainly caused by fungal infection and can be treated clinically with oral terbinafine hydrochloride tablets and topical miconazole nitrate ointment.