If you have blisters on your feet with itching, consider tinea pedis first. Tinea pedis is what the people call foot fungus, which is a fungal infection. The fungus likes to grow in a warm, humid environment, so wear breathable shoes, change your shoes and socks regularly, pay attention to the cleanliness of your feet, keep them clean and dry, reduce foot sweating, and iron or expose your shoes and socks to the sun. If you don’t wash your shoes and socks in hot water or expose them to the sun, the fungal mycelium will easily remain on them, and if you wear them again after your tinea pedis has been treated, you may still get infected again. For the treatment of tinea pedis, you can use topical antifungal drugs such as naftifine ketoconazole and sertaconazole. Dacronin is currently resistant to more people, so it is not the drug of choice. For a clear diagnosis of tinea pedis, a fungal microscopy can be done, and this test is less time consuming. It is recommended to first improve the examination and apply medication after a clear diagnosis. If topical medications are used first, it may not be easy for the examination to make a clear diagnosis and may cause misdiagnosis.