Soaking feet in water with mugwort leaves is generally not a treatment for gray nails. Mugwort leaves are mainly used for the treatment of vomiting blood, blood in stool, leakage (excessive menstrual flow or dripping), menstrual disorders, dysmenorrhea, fetal restlessness, cold pain in the heart and abdomen, diarrhea and dysentery, eczema, scabies, hemorrhoids, carbuncle ulcers and so on. Gray fingernails, also known as goose claw wind, grey fingernails. Most by the ringworm spread for a long time, so that the blood does not honor the claws and become. Mugwort boiled water foot soak can promote the circulation of blood in the feet, relieve fatigue, but also can relieve the feet of eczema itching and other symptoms, but generally can not treat gray nails. If gray nails, you should go to the hospital in time, under the guidance of professional physicians, do not self-medication, so as not to delay the condition.