Answer to your questions;
No...
Could be many things or one of many things, head, Head gasket, water pump, radiator, radiator cap, pipes, flange, thermostat valve, fan switch, fan, expansion tank...
Don't worry, your problem will be solved, we are here to help
My questions;
Any bubbles in radiator?
And pressure in radiator even when car is cold but started?
Any symptoms of rust in system?
Previous history? Which coolent? Last head gasket replacement?
Radiator condition? any leak? Fins fine?
Fan condition? Speed? Wrapped? Auto?
Pipes condition? Rust? Which one was changed?
Thermostat installed?
Since when you are facing the problem?
Last work before problem started?
If you answer approx 80% of these questions then we can try to tell you the problem...