Are there certain things that make getting phlebitis more likely?

Yes: While phlebitis can commonly be an isolated, benign phenomenon in patients with varicose veins, it can also be the "tip of the iceberg" of a significant occult process. Board-certified phlebologists are trained to identify clues in a patient's history that point to conditions such as hypercoagulable disorders and malignancies. Patients should seek expert medical attention for assessment/treatment.

Varicose veins: Peolke who have varicose veins are more likely to have phlebitis. This is a clot in that varicose veins. Stasis or injury to the veins are usually the most common cause.

Yes: Varicose veins, venous reflux, hypercoagulable states, limited mobility, trauma to the vein.

Yes: Besides varicose veins, venous reflux, hypercoagulable states, limited mobility, and trauma to the vein as dr. Bulger mentioned, other things include pregnancy, dehydration, and some medications.