A spider angioma is a small, bright-red spot on the skin that's surrounded by thin red lines. These lines may look a little bit like a tiny spider, which is how it gets its name. It's not caused by spiders.
The cause of spider angiomas isn’t known, but some people are more likely to get them:
People with a liver disease such as cirrhosis
Women who are pregnant or who take birth control pills
Spider angiomas on the face are common in fair-skinned people.