Last time I went to donate blood, I sent a text message saying that my blood donation was not up to standard.

Before blood donation, the physical examination and blood test are unqualified, generally as follows:

1. 18 years old, male weight less than 50KG, female weight less than 45KG.

2. Blood pressure is not within the normal range, pulse is abnormal, or there is something wrong with cardiopulmonary hearing;

3. Jaundice can be observed;

4. Hemoglobin is not up to standard;

5. High transaminase;

6.HBsAg positive.

You provide too little information for others to help you. After reading the above possible reasons, analyze it yourself according to the opinions of the blood station physical examination doctor.