No, hyaluronic acid serum does not make your face puffy. In fact, it has the opposite effect. Hyaluronic acid is a naturally occurring substance in the skin that helps to retain moisture, keeping it plump and hydrated. When applied topically in the form of a serum, hyaluronic acid attracts and holds onto water molecules, resulting in increased hydration and a smoother appearance. It helps to improve the skin's moisture barrier, making it look more supple and reducing the appearance of fine lines and wrinkles. So, rather than causing puffiness, hyaluronic acid serum can actually help to reduce puffiness by providing much-needed hydration to the skin.