A facial

 A facial is a type of cosmetic procedure performed at a spa, salon, or even at home. It's designed to cleanse, exfoliate, and nourish the skin, promoting a clearer, healthier complexion. Facials often include various steps like cleansing, steaming, extractions (if needed), masks, and moisturizing.

Here's how you can use "facial" in English:

As a noun:

• Referring to the treatment: "I'm going to get a facial next week." "She gave herself a facial at home." "The spa offers a variety of facials."
• Referring to the area of the face: "The cream is specifically designed for the facial area." (Less common, but possible)

In other phrases:

• Facial cleanser/wash/scrub: Products used for cleansing the face. "I use a gentle facial cleanser every morning."
• Facial mask: A treatment applied to the face for a specific purpose. "This clay facial mask is great for oily skin."
• Facial expression: The look on someone's face. "Her facial expression showed her surprise." (This is a different meaning of "facial," but related to the face)

Examples in sentences:

• "My skin feels so much smoother after a facial."
• "I'm treating myself to a facial for my birthday."
• "The esthetician recommended a hydrating facial for my dry skin."
• "He winced, making a strange facial expression." (Here, "facial" modifies "expression")
• "I forgot to pack my facial moisturizer."

So, "facial" usually refers to a cosmetic treatment for the face. It can also be used to describe products used in that treatment or, less commonly, the facial area itself. Just be aware that "facial expression" is a separate, though related, meaning.