My Son Who Will Tutn 18 This Month Wants To

My son who will tutn 18 this month wants to donate a kidney to a family friend but we have alot of diabetics on both sides of his family as well as high blood pressure he has had high blood pressure before but was taken off meds i am prediabetic when he was born is sugar was high and they had to give him special milk the first 24 hours so should he reconsider his decision? Also my mother passed away this march kidney failure because she was diabetic.