What is the skin condition characterized by excess oil production?

The skin condition characterized by excess oil production is seborrhea. This condition occurs when the sebaceous glands in the skin produce an excessive amount of sebum, which is the oily substance that helps keep the skin moisturized. When there is too much oil, it can lead to oily skin and may contribute to various skin issues, including acne. Symptoms of seborrhea can include greasiness, flakiness, and irritation of the skin.

In contrast, acne is primarily a condition that arises from clogged pores, which can be related to excessive oil production, but it is not solely defined by oil production. Psoriasis is an autoimmune condition that results in the rapid proliferation of skin cells, leading to thick, red, scaly patches, and is not characterized by excess oil. Eczema, or atopic dermatitis, is an inflammatory skin condition that typically presents as dry, itchy patches and does not relate to oil production. Thus, seborrhea is specifically associated with an overproduction of oil, making it the correct choice.