This is a multicenter, non-randomized, non-interventional two-cohort study with prospective collection of primary data on monitoring of Chronic spontaneous urticaria (CSU) patients by telemedicine or F2F visits in routine clinical care. This implementation science study will collect data from patients during routine CSU monitoring via F2F visits or teledermatological visits. The study will be representative for the real-world patient CSU population in Germany.