My son is autistic and was terrified of blood tests, he still struggles. However, at 12 he was diagnosed with a serious chronic condition which means he has to have very regular blood tests, cannulas, and other treatments. His Great Ormond Street nurses struggled with getting blood from him because of low blood pressure and he has to have the vascular access team do it.
The only things that have got him through are:
- Knowing that he has to have it done.
- Numbing cream applied at home beforehand.
- Not talking about what the phlebotomist is doing.
- A Where's Wally book to block the view and keep his mind occupied.
- Reminding himself that the cream does work and he feels nothing.
- Moving to the adult phlebotomy clinic - they are far quicker, there's no waiting, and they don't make any fuss.
The first time he had to have a blood test was the same day that he underwent emergency jaw surgery. When the chips are down they can do it.
Our job as parents is to validate their feelings, but also to show confidence that they can do these things. Be factual, breezy, and kind. But truly the only way to get over this is to do it.
Also there are physical techniques you can do to combat vasovagal syncope using muscle tensing and eating some salty food beforehand can help. I once treated a girl who desperately wanted contact lenses but had tried 3 separate times and fainted every time. She just couldn't touch her eyes. We did 6 weeks of graded exposure (watching people put contacts in, touching contact lenses , looking at pictures of eyes, touching her eye, etc) and practiced the muscle tensing and she did it on her next attempt.
https://www.immunize.ca/sites/default/files/Resource%20and%20Product%20Uploads%20(PDFs)/COVID-19/fainting-muscle-%20tension-resource-AODA-compliant-e.pdf
My son's next challenge is to do a blood test and then a cannula without the numbing cream. If I gave him lots of reinforcement of his fears around this he never do it. But the plan is to acknowledge he's scared, talk about the positives to doing it, and reinforce that I know he can do it.
Good luck.