big cheif, i am 18 so fairly close range of age.
I currently gibe blood and cab see how it goes wrong, if you place the needle wrongly you can damage nerves within the arm or puncture the vein on both sides causing a bleed out when the needle is retracted, you would need to make sure the needle is beyond sterile and this can only be achieved by straight out of packet needle use combined with the alcoholhol 1 minute wipe on the arm area to avoid infection.
I am currently a first aider (st johns trained) and a trained lifeguard. and from this point of view it is a silly idea. I would hate to be a repsonder to some poor lad who’s tried to take blood from his mother and find her unconscious with a large amount of blood loss and you going mental trying to sort the situation especially with a used needle in the immediate area.
The largest risk is you making a small error and your mum dying from blood loss.
I Would advise you go to st johns ambulance and get training, and also attend a give bloos session ( whilst you can only give blood from 17 you could get your mum to give blood and you to watch, i’m sure the nurses would be more than happy to show you and talk you through it, and if you attend for a while they may even get you on the course. Also volunteer at a care home, and when you get to 16 do your pool lifeguard course! two of my friends have done the course, one is at university studying to be a doctor and the other a paramedic!
Also if you openly use needles and you want to give blood no one will take you if they find out you and your mum used to practice on each other, the risk for getting hep b and c and tetanus would be amazingly high!
also if you did get this experience and the doctors found out you wouldn’t get near the course based upon inconsiderate and dangering actions and they would see you as a risk to others on courses or patients.
If you didn’t mention it and do become a doctor and some body were to find out you would get taken of the medical list and fined a hefty sum!