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It is more than likely a problem with her uropygial (preen) gland.

The most common abnormality of the uropygial gland occurs from vitamin A deficiency. This may cause glandular metaplasia and hyperkeratosis. Birds on poor diets are likely to be vitamin A deficient, and in addition to blunting of the choanal papillae that is commonly seen with hypovitaminosis A, enlargement of the uropygial gland is a likely sequela, as well. Although there are common references in the avian literature concerning impaction of the uropygial gland, in this author's practice, this is very rarely observed. The gland normally appears somewhat swollen, which may be mistaken for disease. With hypovitaminosis A, a hyperkeratotic plug may form in the gland, which may be dislodged by gently massaging or milking the gland after moist hot compresses have been applied. Correction of the diet and perhaps an injection of parenteral vitamin A, will usually rectify the problem.

Neoplasia of the uropygial gland may occur. Adenomas, squamous cell carcinomas, papillomas, and adenocarcinomas have all been reported.3,5 Neoplasms may have variable appearances, may be unilateral or bilateral, and they may superficially ulcerate.

Infection may also occur in the uropygial gland. This may be secondary to hypovitaminosis A, immunosuppressive disease, such as that which occurs with Psittacine Beak and Feather Disease (PBFD), or trauma. However, in this author's experience, infectious adenitis is a rare occurrence. Bacterial or fungal adenitis does not often occur, and when it does, it is usually in PBFD positive birds. Infected glands may abscess.

Another condition of the uropygial gland has been observed by this author, but has not been described in the avian literature. Two obese cockatiels presented with the primary complaint of staining and a greasy appearance over the area of the uropygial gland and retrices. Examination of the gland showed swelling and upon massage of the gland, an excessive amount of the oily gland secretion leaked out through the wick. Both of these cockatiels were hens, very obese, on poor all-seed diets, and color mutations. Both birds responded to a weight loss program, dietary changes, and increased exercise. Once the hens reduced their weights to the normal range, the uropygial glands ceased producing excessive secretions.

Rupture of the uropygial gland has been reported in gentoo penguins and in free-living seabirds in Europe.

Chronic dermatitis of the skin over and surrounding the uropygial gland may occur and may respond to appropriate medical therapy based on the cause.

Any of these could very well be the cause, however, I should definentally advise you to go to the vet and get her looked at- it could be a cyst or worse, a tumor.

hello it's going to have abit of whats known as scaly face it influences the cere (the facet across the nostrils) and in addition the legs. it brought about by way of a mite. does it seem form of crusty ,chalky or have a honeycomb apperance..(does seem boney relatively on the whole.) readily handled with an answer to be had at such a lot well petshops or vets.. simply observe a drop or 2 on a cotton tip to the affected locations. comply with because the recommendations state at the bottle sorry cant believe of the identify of the product i had final.. maybe quality to regard each birds even supposing hes no longer noticably affected..

Possible tumour of the preen gland, but could be a feather cyst too. A vet will tell you one way or the other.