Those who can donate blood: A physically and mentally healthy person can donate blood. Blood donors must be between 18 and 60 years of age. Body weight should be 45 kg or more. Weight loss will be followed by fatigue and constant tiredness. The amount of hemoglobin in the blood , pulse and body temperature should be normal. Respiratory Diseases Asthma , Hapani Those who are unable to donate blood should be free from skin diseases. In addition, there are some tests that need to be done to verify the suitability of blood donation. Such as: 1) Anemia , 2) Jaundice , 3) Pulse rate , 4) Blood pressure , 5) Body temperature , 6) Weight , 6) Hemoglobin test , 6) Measuring blood sugar level 9) Serac creatinine , 10) ECG. The tests are very simple. So blood donors should be tested in advance. In times of danger so as not to delay. An adult can donate blood at least once in 4 months. In Bangladesh, blood transfusion is considered safe once every 3 months. Once a blood donor donates blood, only 1 percent of the body's blood is lost. But in a short time this amount of blood becomes the same as before. The body usually has 5-6 liters of blood. Blood donors usually donate 400-450 ml of blood at a time. Giving this amount of blood has no effect on the body. So there is no reason to be afraid of blood donors. However, special precautions must be taken before and after blood donation. Special precaution in blood donation: It is necessary to eat well 4 hours before blood donation. It is not right to donate blood on an empty stomach. Blood cannot be given while taking aspirin and similar drugs. Such drugs should be stopped 48 hours before blood donation. No energy drink should be consumed 24 hours before blood donation. If there is any tattoo or tattoo on the body or if nose or ear is pierced then blood should be given after 2-4 weeks. Blood should not be given while taking antibiotics. The issues are urgent so the blood donor must accept them. At the same time make sure that the needle that is being used while giving blood is safe. Your little carelessness can take the form of a deadly disease. Therefore, extra care should be taken to donate blood.