I have a genetic condition that requires frequent treatment with an intravenous drug. I’ve been trained for many years to do this myself and I keep it at home, this means no hospital visits for meds which was the (awful) norm before I learned.
I have dc with the same condition, so when they became symptomatic I was trained to treat them and when they became old enough, high school age, they were taught to self treat. It enables them to lead an almost normal life. They are bloody brilliant at it, very proud of them. Youngest dd is 13 and because she had very small and awkward veins she has only just learned, she’s been practising on everyone recently. We do each other’s too if necessary.
The condition I have also put me at risk of dvts in pregnancy so each time I had sub-cutaneous blood thinners throughout and for 6 months after. Years ago now though but I have also recently had to start another sub-cutaneous drug on a permanent basis, but only once every two weeks. Stomach is easiest.
I would much rather give myself an iv injection than a sub cut, it’s obviously technically much more difficult but definitely less painful.
I sympathise with people with needle phobias and can understand the fear, but our condition is completely debilitating with a considerable fatality rate if not well managed, so you just get on with it. It becomes as normal as making a cup of tea believe it or not.