Which form of herpes generally causes infections from the waist down?

Herpes Type 2 (HSV-2) is primarily associated with infections in the genital area and is the strain of the herpes virus that most commonly causes outbreaks of genital herpes. It typically results in sores and lesions located around the lower part of the body, including the genital region and the buttocks. This characteristic distribution is what distinguishes HSV-2 from other strains, particularly HSV-1, which more commonly causes oral herpes but can also lead to genital infections, usually as a result of oral sexual contact.

Genital herpes is a term used to describe the infection caused by HSV-2, but the question specifically asks for the type of herpes virus, making HSV-2 the most precise answer. While the term "Herpes Simplex Virus" encompasses both HSV-1 and HSV-2, it does not specify the type that is associated with lower body infections, hence it is less accurate in this context.