Write an article based on this "Try not to react when bitten. Don't try to punish the cockatiel. Only pet the cockatiel if it remains calm."
If the cockatiel bites you, try to keep your reaction to a minimum. Jerking away violently, responding loudly, or ending the taming session can encourage the bird to bite again. This can be difficult to avoid due to the painful bite, so try to avoid serious bites in the first place by leaving the cockatiel alone when it is hissing, when it has fully extended its head crest, or when its crest is flattened against its head. Wear thick gardening gloves if biting is a recurring problem. Cockatiels do not typically understand what you are doing when you attempt to punish them. They may enjoy it when you shout at them, return them to their cage, or otherwise react to bad behavior. Focus on praising the cockatiel during good behavior instead, or use mild forms of punishment such as ignoring the bird, or gently withdrawing the jewelry it is nibbling. Many cockatiels will only let you pet their crest or beak, and some dislike any form of petting. Pet slowly, and withdraw slowly if the bird hisses, nips at you, or flattens its crest.