What is the primary function of corticosteroids in treating allergic contact dermatitis?

The primary function of corticosteroids in treating allergic contact dermatitis is to reduce inflammation. Allergic contact dermatitis is characterized by redness, swelling, and irritation of the skin, which are all symptoms of an inflammatory response. Corticosteroids are powerful anti-inflammatory medications that work by suppressing the immune system's response at the site of inflammation, thereby decreasing redness, swelling, and overall discomfort.

While reducing itching is also important in the treatment of allergic contact dermatitis, the mechanism of action of corticosteroids primarily targets inflammation. The other options, such as eliminating bacteria, may be relevant in cases where infection is a concern, but that is not the main role of corticosteroids. Similarly, moisturizing the skin is beneficial, particularly in aiding healing, but it is not the function of corticosteroids. Therefore, the most accurate description of the role of corticosteroids in this context is their ability to effectively reduce inflammation.