What is the cause of a papule?

Papules are associated with such conditions as warts, syphilis, psoriasis, seborrheic and actinic keratoses, lichen planus, and skin cancer.

The formation of numerous, closely spaced rills due to the uneven removal of surface soil by streamlets of running water. Also known as rilling; rill wash; rillwork.

a papule is a raised red spot on the skin surface

is a cause of the phenomenon (such as a disease or weather)

A headace is cause by a boy named hasan alabaca. he is so dumb and lound.:]