Telangiectasias are small blood vessels just below the surface of the skin. The blood vessels are very visible through the skin. They may appear as a single vessel or as many vessels in clusters.

Telangiectasias are caused by blood vessels that are stuck in a wide open position. There is no clear reason for why this happens in many cases.

Some telangiectasias are due to conditions like:

Rosacea
Telangiectasia may be related to rosacea.
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