Eyelash extensions and other beauty treatments, such as eyebrow microblading or skin treatments, can be safe when performed by skilled and experienced professionals in a clean and hygienic environment. However, safety largely depends on several factors, including the expertise of the practitioner, the quality of products used, and adherence to proper hygiene protocols. It's essential to research and choose reputable and licensed professionals or facilities, follow aftercare instructions diligently, and communicate any allergies or sensitivities to the practitioner. While these treatments can enhance one's appearance, there is always a small risk of adverse reactions or infections, so informed decision-making and responsible aftercare are crucial for ensuring safety.