Toenails that have grown into the flesh are medically known as ingrown toenails and are prone to secondary infections that can cause onychomycosis. According to the severity of ingrown toenails, general treatment, medication and surgery can be taken. 1. General treatment: If the ingrown toenail is only slightly painful and does not cause infection, you need to pay attention to trimming the nails not to be too short, too deep, try to wear loose and breathable shoes, and avoid standing for a long time. 2. Medication: If the ingrown nails have obvious redness, swelling and pain symptoms, you need to use iodine to disinfect the local area, apply mupirocin ointment, erythromycin ointment and other ointments for treatment. 3. Surgery: If the ingrown toenail has formed a granuloma or abscess, it should be treated with surgery in time, which requires incision and drainage, removing the toenail embedded in the flesh as much as possible, or pulling out the whole piece of toenail, and finally carrying out anti-infection treatment. It is recommended not to trim the toenails excessively and keep the feet clean and dry. If the symptoms of ingrown toenails are serious, you should go to the hospital in time and follow the doctor’s instructions for standardized treatment.