Cold sores are commonly caused by the herpes simplex virus type 1 (HSV-1), which is widely prevalent among the population. According to data from the CDC, approximately 80% of Americans carry HSV-1, highlighting its commonality. Importantly, while HSV-1 causes cold sores primarily around the mouth, it is usually not classified as a sexually transmitted disease (STD). The distinction arises because HSV-1 is primarily transmitted through non-sexual contact, such as kissing or sharing utensils, especially during childhood. On the other hand, genital herpes—a chronic, lifelong infection—is usually caused by two types of herpes simplex virus: HSV-1 and HSV-2. HSV-2 is predominantly linked with sexually transmitted genital herpes; however, HSV-1 can also cause genital herpes through oral-genital contact. Understanding these differences is crucial for accurate diagnosis and reducing stigma. The CDC’s Sexually Transmitted Infections Treatment Guidelines from 2021 emphasize that HSV-1 cold sores generally do not represent an STD. This information helps clarify common misconceptions and promotes awareness about herpes infections. Prevention strategies include avoiding direct contact with active sores and practicing good hygiene. Medical professionals recommend consulting healthcare providers for proper diagnosis and management of herpes infections.