Toenail odor is mainly caused by fungal infection under the toenail, the fungus decomposes the nail skin to form a yellow mud-like material, the yellow mud-like material contains a large number of fungi, the fungus in the process of reproduction decompose the nail skin under the nail, so it will be accompanied by a very obvious bad odor. If you go to the local hospital for testing, you can find a lot of mycelium in the yellow mud-like material. If you want to get rid of the odor, it is recommended not to keep too long toenails, choose oral medication with topical medication, oral medication choose terbinafine tablets or itraconazole capsules, 1-2 tablets/time once/day for 1-2 months. Topical medications are recommended to use clotrimazole cream or sertaconazole nitrate cream, or you can also choose to use miconazole cream for treatment, which can assist in killing the fungus, thus eliminating the yellow mud-like material and achieving the purpose of removing toenail odor.