The most important step in the aftermath of the injury is to ice your hand as soon as possible. The cold temperature slows down the blood flow to the area, reducing any swelling or inflammation that could make the injury worse. The extreme cold will also numb the area, reducing how much pain your experience, as mentioned above. If you don’t have ice, any cold object will do. A bag of frozen vegetables from the freezer is just as good as an ice pack. Point your finger up toward the sky. Just like with the application of cold, the goal is to decrease the blood flow to the injured area to reduce swelling. As you’re icing your injury, keep both your hand and finger up in the air. If the most severe pain is in the palm, or if any of your joints are affected, you should seek expert medical attention as soon as possible. However, if you closed the door on the tip of the finger and didn’t injure your joints or your nail bed, the doctor may just advise that you rest your hand and wait it out. You can tell if the nail has become partially detached from the nail bed by looking for dark discoloration under the nail. This discoloration indicates that blood is pooling under the nail, and you need to contact a doctor for advice on how to proceed. If it’s just a small amount of blood, the injury might heal on its own. However, large amounts of blood can be painful, and might require action. The doctor may ask you to come in so he or she can release the pressure building up under the nail, or they may direct you to relieve the pressure yourself. The doctor should drain the hematoma if the collection of blood is less than 24 hours old. If more than 48 hours have passed, the blood has clotted and there is no use for draining.  Patients should have a neurovascular examination of the hand. Flexion and extension should be tested in all finger joints. Do not attempt to relieve the pressure without first consulting a medical professional. However, if a professional gives you to go-ahead, you can drain the nail bed by following his...

How would you rephrase that briefly using Vietnamese?
Chườm đá ngay lập tức. Nâng cao ngón tay. Kiểm tra vị trí chấn thương trên tay. Bảo đảm rằng lòng móng tay không bị chấn thương. Tuân theo hướng dẫn của bác sĩ về cách để loại bỏ lượng máu tích tụ bên dưới móng tay. Tìm kiếm sự chăm sóc y tế nếu cần.