Summarize the following:
If your dog is in pain it may struggle or bite while you try to treat its wound. If possible, have another family member or friend restrain your dog while you examine its injury. Be sure to handle your dog firmly but gently to avoid causing it extra pain.  To restrain your dog, kneel down by your dog's side so you're facing its head. Then, take your arm that's furthest from your dog and hook it under your dog's chin. Take your other arm and wrap it around your dog's chest, behind its front legs. Finally, pull your dog close to your body and hold it there. Restraining your dog may help to calm it down if it feels panicked by its injury. Even the most docile dog may bite its owner after suffering a disorienting injury. Before treating your dog's wound, muzzle it gently to prevent biting. Be sure that the muzzle does not touch the wound.  If your dog's wound is located too close to its mouth to muzzle it, proceed with caution. If you do not have a muzzle, you can wrap gauze around your dog's mouth temporarily to keep it from biting you. If your dog has a small wound, cover it with a clean piece of medical gauze. Apply constant pressure to the wound for up to 20 minutes to slow or stop the bleeding. If your dog has a large laceration, place a clean towel over the wound. If the bleeding continues after 20 minutes, bring your dog to a vet right away. Gently wrap a sports bandage or a long strand of soft material around your dog's head, limb, or torso to keep the gauze over the wound. Avoid wrapping it too tight, which may restrict your dog's breathing or circulation. Tie the bandage or material firmly with a knot. Avoid using tape to keep the bandage in place as it will adhere to your dog's fur and cause irritation and hair loss. If one of your dog's front or back paws is injured, you can slow down the bleeding by raising it above heart level. This will be the easiest to do if your dog is lying on its side, with the injured limb facing upwards. Keep gentle pressure on the wound. Similarly, if your dog has an ear injury and long ears, gently pull the ear up above its head to help stop the bleeding. Your dog may get an infection if its wound is left untreated for more than a day or two. Bring your dog to a veterinarian as soon as you can to evaluate and treat the injury. Your vet can also provide advice for how to care for the wound while it heals. Your vet may also have to check for internal bleeding, depending on the injury your dog suffered.

Summary:
Restrain your dog if possible. Muzzle your dog to avoid being bitten. Apply gauze to the bleeding area and put pressure on it for 20 minutes. Wrap a sports bandage around your dog to hold the bandage in place. Raise your dog's limb above heart-level if it is bleeding. Bring your dog to a vet as soon as possible after bandaging its wound.