1. Hospital medical records: The hospital will establish a medical record for each patient, recording the patient's personal information, illness description, diagnosis results, treatment plan, etc. You can ask the hospital for the user's medical record as evidence.

2, the doctor's diagnosis certificate: the doctor will diagnose the condition during the visit, and may provide a diagnosis certificate. You can ask a doctor for a diagnosis certificate to prove that you have seen a doctor and obtained a doctor's diagnosis.

3. Drug prescription documents: If the doctor has issued a drug prescription, you can keep the prescription documents as vouchers. The prescription document will have the doctor's signature and drug information, which proves that he has received treatment in the hospital and obtained drug treatment.

4. Invoice for medical expenses: If medical expenses are paid, the hospital will issue corresponding invoices. Keeping the receipt of medical expenses can prove that you went to the hospital and paid the medical expenses.

5. Surveillance video or witness: If there is surveillance video inside the hospital or other people as witnesses, it can prove the fact that you went to the hospital for medical treatment, and it can also be used as evidence.