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.
Here is how to tell the difference: 1  Skin tags typically hang off the skin, while warts are often flattened or cauliflower-like. 2  The surface of a skin tag is very smooth, warts are most often rough and uneven. 3  Skin tags look exactly like what they are, a buildup of extra skin in one area.