Feet soaked in dirty water is very itchy may be contact dermatitis, athlete’s foot, eczema and other diseases caused by the oral medication, applying drugs for treatment. 1. contact dermatitis: local stimulation by irritating substances, allergic substances caused by erythema, itching and other symptoms, can be used locally halometasone cream and other topical, serious oral loratadine and other antihistamine drugs treatment. 2. Tinea pedis: If the patient’s foot touches dirty water, it will cause fungal infection and tinea pedis, resulting in itching and blisters on the patient’s feet. You can apply antifungal drugs under the guidance of the doctor, such as compound ketoconazole ointment, tretinoin econazole cream and other medications, and also oral fluconazole capsules, itraconazole capsules and other medications, which can play an antifungal role. 3. Eczema: the patient’s feet soaked in dirty water for a long time is easy to cause allergic reactions, will cause acute eczema, resulting in patients with skin erythema, pimples, oozing and accompanied by severe itching. You can apply glycerine lotion, compound dexamethasone acetate cream and other medications. If the itching is more serious, you can also follow the doctor’s instructions to take oral antihistamines, such as levocetirizine hydrochloride tablets, loratadine tablets, etc., which can play the role of anti-allergy and anti-itch. The patient’s feet itching symptoms must be timely medical care, and clear cause of the cause of the doctor’s orders for treatment, not unauthorized use of drugs.