Toenail knocked loose if there is no secondary infection can generally be self-healing, if the loosening is obvious or there is secondary infection, you need to carry out medication, surgical extraction, and so on. If the toenail is loosened by external force, and the loosening is mild and not accompanied by pus, you can use iodophor to sterilize it locally, and it can be gradually restored to normal with the growth of the new nail. However, if the toenail loosening is obvious, or accompanied by pus phenomenon, need to carry on the drug treatment, including the use of iodophor, chlorhexidine solution for regular rinsing, can be oral antibiotics such as amoxicillin and so on. If the loosening is severe, the injured toenail should be removed. If the toenail is loosened by trauma, you should go to the hospital in time for examination, and follow the doctor’s instructions when using the above medications.