A disease certificate is a written certificate indicating the patient's condition. It is written by doctors according to the actual situation of patients, and can be kept by patients themselves as the basis of their health status. The certificate includes key information, diagnosis results, treatment plan and other relevant details. A diagnosis certificate is another written document issued by a doctor. It is mainly used to confirm that the doctor has made a detailed and comprehensive diagnosis of the patient and recorded the results. This document will contain basic information about patients, exact diagnosis results and measures taken to cure or alleviate specific health problems.