I'm 19, have polyps on my cervix, they have been frozen, but what are they?

Possibilities: The cause of cervical polyps is not entirely understood. They may result from infection. They can also result from long-term (chronic) inflammation, an abnormal response to an increase in estrogen levels, or congestion of blood vessels in the cervical canal. Ref: www.webmd.com/women/tc/cervical-polyps-topic-overview

See below: Polyps are overgrowth of the mucosa, most cervical polyps are benign and usually do not cause symptoms. Possible causes of cervical polyps include cervical infection, chronic inflammation etc. Keep scheduled follow up with you primary doctor. Hope this helps!