I ate a little before I got my health certificate.

I didn't eat after 22: 00 that night, and I didn't drink water or eat the next morning. 1. If you eat fried food in the morning before you get your health certificate, liver function test's result will exceed the normal value. 2. Take a blood test to see what's wrong with you. Mainly depends on blood items (acidophilic, alkalophilic, mononuclear, lobulated, blood sugar, red blood cells, white blood cells), but some parameters have nothing to do with eating. But the last three items are blood sugar, red blood cells and white blood cells. The parameters before and after meals are different. If you draw blood after a meal, the parameters will be inaccurate and the doctor can't diagnose whether you have a disease.