Anaesthesiologist Dr. Myro Figura warns that nail-biting can transfer bacteria from dirt to the mouth, risking infections.

Dr. Myro Figura, an anaesthesiologist on TikTok, warned against nail-biting, showing hidden dirt under nails that accumulates from various activities like cooking, cleaning, and touching surfaces. This dirt contains bacteria, and biting nails transfers it directly into the mouth, potentially leading to infections. The video, featuring a dirt sample under a microscope, aims to deter nail-biting habits.