It is natural to sometimes feel compelled to gift someone after an event. This is more so after some sort of service, including healthcare. It isn't unusual for patients to want to give gifts to their doctors, nurses and other healthcare workers. This is mostly in attempts to express gratitude after recovery from some illness. It is a way of thanking those who took care of your healthcare needs.
Doctors and other healthcare workers are bound by strict professional codes. One of the codes is to always maintain a professional doctor-patient relationship and resist anything that may blur such a relationship.