After the age of 18 years, all healthy and normal people can donate blood voluntarily. And all healthy people should donate blood. Your donated blood may save the life of a sick person. But if you are not completely healthy on your own, there is no need to donate blood. But it is not enough to just give blood, as a result of giving blood , the blood donor should keep an eye on any physical problem. Before and after donating blood, a blood donor should do something special to maintain his health. Let's take a look at what should be done. Things to do before giving blood: 1) If you feel sick for any reason, refrain from giving blood like that day 2) Eat nutritious food before giving blood , but do not eat anything oily. 3) Eat plenty of water and watery foods before donating blood. 4) The night before the day you give blood, sleep well for a long time. Things to do after blood donation: 1) You will stay in bed for a long time. Do not sit up or stand up in a hurry. 2) Drink plenty of water and watery foods. Do not neglect this matter at all. 3) Eat foods rich in iron , folate , riboflavin , vitamin B6 such as red meat , fish , eggs , raisins , bananas, etc. 4) Refrain from doing physical work for a few hours. And take some time off to work a little less than usual. 5) You can donate blood again after 3 months of blood donation. Do not give blood again before.