Hello ! Restylane is a type of dermal filler that is commonly used to treat wrinkles and facial volume loss. The pyriform aperture is the bony opening on each side of the nasal cavity that is located at the base of the nose. While Restylane is generally considered safe and effective for use in certain areas of the face, such as the cheeks, lips, and nasolabial folds, the use of Restylane in the pyriform aperture is not a commonly accepted practice. The area around the pyriform aperture is delicate and sensitive, and injecting filler into this area could potentially cause complications such as obstruction of the nasal airway, infection, or damage to surrounding structures. It is important to consult with a qualified and experienced medical professional, such as a board-certified dermatologist or plastic surgeon, to determine if Restylane or any other type of dermal filler is appropriate for your specific needs and goals. Best of luck !