Angiomas are benign growths made up of small blood vessels. They can appear anywhere on the body. The three most common types are cherry angiomas, spider angiomas, and angiokeratomas.
Occasionally, an angioma may become irritated from external factors such as rubbing against clothing and will need to be removed to avoid further problems. However, since the majority of angiomas are harmless, most people have them treated for cosmetic reasons.
Cited from the Mayo Clinic & the American Academy of Dermatology