What causes small warts to grow on the body?

Small skin growths, commonly known as "xiao hou zi," are primarily caused by infection with the human papillomavirus (HPV), resulting in skin or mucosal lesions also referred to as warts. This virus spreads through direct or indirect contact, such as sharing towels, bath linens, or other personal items with an infected individual, or by coming into contact with the virus in public baths, swimming pools, or similar settings. When the body's immunity is weakened, it becomes more susceptible to viral infection, leading to the formation of these small skin growths. Additionally, unhealthy lifestyle habits and skin injuries may further increase the risk of infection. Generally, these growths do not cause noticeable symptoms but may affect appearance and possess a certain degree of contagiousness. Therefore, once such growths are noticed on the body, it is important to seek medical attention promptly and follow the treatment recommendations of a qualified physician.