You can take a shower 10 hours after blood donation because the amount of blood donated is basically between 200-400ml each time. After blood donation, the body will lose some plasma and some blood cells, which will be replenished in about 10 hours after drinking and eating, while the replenishment of blood cells will take about 1 week. After blood donation, the patient may experience mild fatigue and weakness. However, after about 10 hours of rest, the patient’s strength will be restored and it is time to take a shower. Because blood vessels expand and physical exertion occurs when bathing, bathing after 10 hours of rest and eating adequately will not cause significant discomfort. If you take a shower immediately after donating blood, you may also experience a drop in blood pressure and dizziness and discomfort. In addition, if the injection site is exposed to water too early, it may cause infection. Therefore, you can take a shower about 10 hours after donating blood.