What term refers to red spots that persist due to dilated blood vessels?

The term that accurately describes red spots that persist due to dilated blood vessels is telangiectasia. This term refers specifically to small, dilated blood vessels that are visible on the surface of the skin and can appear as red or purple lines or spots. They often become more noticeable due to various factors, including sun damage, aging, or certain skin conditions.

Persistent erythema, while related to redness of the skin, does not specifically denote the condition of dilated blood vessels and may refer to general inflammation or flushing that is sustained over time. Other options, such as vascular erythema and petechiae, address different conditions or forms of skin manifestation, but do not encapsulate the specific nature of persistent red spots caused by the dilation of blood vessels as telangiectasia does. Thus, telangiectasia is the most precise term in this context.