I'm sorry that your question wasn't answered in a timely manner, Delphine. I believe that you're misinterpreting what's going on with your cockatiel. It sounds as if she's fluffing rather than retaining fluid which is going to be evident in her abdomen rather than her upper body if that were occurring. Bleeding from her eyes might result from vitamin K deficiency but I'd be more comfortable knowing that an avian vet took a look at her eyes as well as the rest of her in order to define better what's going on.
Nutritional imbalances are a common cause of illness in our pet birds. What has her diet consisted of, please? Seeds should compose less than 20% of her diet. Ideally, a balanced pelleted diet such as can be found here: www.harrisonsbirdfoods.com or here: www.lafeber.com/pet-birds should be fed as well as hard boiled egg yolk, pancakes and cornbread, the tops of fresh greens, dairy products such as yogurt and cheese, fresh fruits such as apples, pears, melon, kiwi, and berries, vegetables such as broccoli, carrots, beets, asparagus, cabbage, sweet potato, and squash, and even tiny pieces of meat. Until you can have her attended to, please add an avian vitamin such as Oasis brand to her water at half the dose on the label so as not to make her water distasteful. Also add a calcium supplement such as Calciboost or Calcivet to her water. I suspect that she's currently calcium and vitamins A, B12, D3, and K deficient.
Please respond with further questions or concerns if you wish.