Can I really use blood for free after donating blood? Yes, but under certain conditions, blood donors can enjoy the treatment of free blood use. Blood donors themselves can enjoy five times the medical blood consumption within five years from the date of blood donation, and enjoy the same amount of medical blood consumption after five years. Spouses and immediate family members (including parents and children) who donate 800cc blood for free can enjoy the same amount of blood for medical use from the 30th day of blood donation.