Foot odor in diabetic patients is a fungal infection, which is more common in clinical practice and can be combined with nail fungus in severe cases. If the blood sugar is well controlled, the foot odor will be significantly improved. In addition, patients should ensure foot hygiene, wash their feet and change socks every day, and do not share a foot wash basin with others to prevent cross-dyeing. If the foot odor is still heavy after the patient’s blood sugar is well controlled, topical antifungal ointment can be used externally, which will also achieve a better treatment effect.