A circle of white on the edge of the nail tip may be caused by trauma, trace element deficiency and onychomycosis, etc. Patients should choose appropriate care and treatment according to different causes to avoid delaying the condition. 1. Trauma: due to sharp tools to scratch the nails, may produce nail tip edge a circle of white. If the symptoms are mild, patients do not need to deal with it. If the symptoms are serious, they can be relieved by hot compresses and other means. 2. Micronutrient deficiency: The lack of calcium and zinc caused by not supplementing enough micronutrients and vitamins in daily life results in poor nail development. Patients can supplement trace elements by consuming foods rich in calcium and zinc such as milk, peanuts, fish and beef. 3. Nail fungus: caused by dermatophyte infection, the patient’s nail plate becomes white, resulting in nail fungus. Patients can take drugs such as terbinafine, itraconazole and fluconazole under the guidance of doctors for antifungal treatment. Nail tip edge of a circle of white there are other reasons, it is recommended that patients timely hospital consultation, clear cause, under the guidance of the doctor symptomatic treatment, so as not to delay the condition.