Class Trematoda: Infect the internal organs of hosts. Parasitic Can be endoparasites (live in the host) or ectoparasites (attach to external surfaces of the host. Size: ~ 1 cm to 10 cm Covered in an unciliated cuticle. Usually require 2 hosts to complete it's life cycle.
Warts are generally caused by a human virus known as papilloma while moles are generally related with age and caused by hormones and environmental factors. There are cases when kids are born with moles but in general moles on the face increase with increase in age.
Warts tend to be rougher, with a âwartyâ irregular surface whereas skin tags are usually smooth. Warts tend to be flat whereas tags are more like bumps hanging from thin stalk. While warts are almost entirely caused by human papilloma virus (HPV), tags are only sometimes associated with HPV.