In the case of finger nails being bruised by a door catch, reasonable treatment measures need to be taken strictly under the guidance of a doctor. Usually after the fingernail is pinched by the door, there will be bruises in the nail, and if the bruises are small, you can apply local ice packs appropriately within 24 hours, so as to improve the pain and reduce the oozing. Patients can also apply hot compresses after 24 hours, which can promote the absorption of bruises. If there is more bleeding, part of the nail should be removed under the supervision of the doctor. If necessary, patients should also follow the doctor’s instructions to use diclofenac, mazolam and other drugs to reduce swelling and pain. Patients also need to pay more attention to hand cleaning, to avoid local external stimulation, and also need to actively regulate the diet, eat more nutritious food, is conducive to wound healing. In addition, patients also need to quit drinking in time, avoid eating spicy and stimulating food, so as not to aggravate the symptoms. If the bruising is serious and there is localized swelling and deformity, it is necessary to go to the hospital to take X-rays to exclude the possibility of fracture. It is recommended that the patient’s fingernail is caught in the door after the bruising, according to their own symptoms, under the guidance of the doctor for targeted treatment.