They may be of soft or firm consistency.The surface may be smooth or rough.If capped by scales, they are known as squamous papules, and the eruption is called papulosquamous.

• 丘疹质地或软或硬，表面光滑或粗糙，如被覆鳞屑，称为鳞屑性丘疹或丘疹鳞屑疹。