If you want a doctor to issue a certificate of leave of absence from school, you usually need to follow the following steps:

1. See a doctor. Go to a general hospital or specialized hospital at level 2 or above for treatment. The doctor will evaluate the condition and make treatment recommendations.

2. Put forward demands. Indicate your willingness to take a leave of absence from school for treatment and recovery to the doctor. The doctor will determine whether it is necessary to issue a leave of absence certificate based on the condition and treatment plan.

3. Fill in the application form. If the doctor agrees, you need to fill in the suspension application form, including personal information, disease diagnosis, treatment plan and suspension time.

4. The doctor’s signature and seal. After filling out the application form, ask the doctor to sign and stamp it, indicating the time of study leave and suggestions.

5. School approval. Submit the suspension certificate to the school for approval, and the school will decide whether to approve the suspension based on medical advice and school regulations.

6. Approval from the education authorities. In some cases, a leave of absence application may need to be submitted to the education authority for approval.

7. In addition, depending on the specific circumstances, other relevant supporting materials may be required, such as disease diagnosis certificates, medical records, etc. Please note that the specific procedures may differ in different regions and schools. It is recommended to contact the relevant school departments for detailed procedures and requirements.