Children can wait until their fingers are no longer bleeding before washing their hands after blood collection, there is no clear time limit.
Children can use cotton balls to stop bleeding after finger blood collection, do not wash your hands immediately, finger blood collection trauma is relatively small, generally press five minutes after the finger will no longer bleed, no longer bleed after you can wash your hands.
When washing hands, do not rub the part of the blood collection, to prevent the eye of the needle to rub broken caused by bleeding again, after the water may cause the eye of the needle infection, safety can be an hour later to wash hands.
It is recommended to pay attention to the care of the finger after blood collection, do not need to be too nervous, if you find that the finger has an infection and other abnormalities should be promptly sought medical treatment.