How long does it take for a patient to recover from localized bruising under the nails? Generally speaking, it takes two to three weeks, depending on the patient’s own tissue absorption capacity and the severity of the bruising. Bruising under the nail is often caused by trauma. Crushing causes the capillaries under the nail to rupture, resulting in bruising. If the degree of injury is severe, a hand and foot surgery visit is recommended to see if nail extraction is needed to treat the injury, and if the damage under the nail bed is more severe, it may need to be repaired. If the injury is mild, with little bruising and no obvious infection, etc., it is usually self-absorbed and usually takes 2 to 3 weeks. If there is no clear history of trauma, common causes such as: liver disease or blood system or its infectious diseases, it is recommended to consult the hospital to clarify the diagnosis, so as not to delay the treatment of the disease.