Ducks are adorable and very easy to take care of which is why they tend to make good pets. Ducks have also adjusted well to humans as a result of long periods of domestication.
Even though you (or your friend or loved one) have just been injured, make sure that the duck is not hurt. If the duck has bitten you for the first time or if it is behaving abnormally, it could be injured or ill.
If the bite did not break your skin, then all you need is a pain reliever to reduce the swelling and pain. However, if the wound is bleeding, you may need medical attention.
If you are able to care for the wound without extra medical assistance, be sure to thoroughly clean it. If the bite area is bleeding or the skin has opened up, there is a high chance you can develop an infection.