Final answer:
Seborrhea (option C) is the disorder caused by excessive secretions of the sebaceous glands, leading to conditions such as acne. It is not related to Cushing's disease, which involves hypersecretion of cortisol and can also affect skin health.
Step-by-step explanation:
The disorder caused by excessive secretions of the sebaceous glands is Seborrhea. This condition is characterized by an overproduction of sebum, potentially due to hormonal imbalances or other factors affecting the sebaceous glands. Seborrhea can lead to skin problems such as acne and other skin conditions that cause inflammation and discomfort. While milia, asteatosis, and bromidrosis are also related to skin disorders, they are not caused by an overactive production of sebum.
Milia are small cysts filled with keratin, asteatosis is dry skin resulting from underactive sebaceous glands, and bromidrosis is a condition characterized by body odor due to bacterial decomposition of sweat, specifically involving the apocrine sweat glands. Remember that other hormonal disorders such as Cushing's disease, which is characterized by the hypersecretion of cortisol from the adrenal glands, can also have implications on skin health, though it is not caused by sebaceous gland activity.