Grab rails

You shouldn't use a grab rail if you have a shoulder injury. You are likely to do more damage. It is 25 years since I was working so cannot help you professionally as times have changed. Have you googled what is available such as a stool specifically for your problem?

I ended up getting rid of my bath and have a fabulous shower, but I bought an adjustable stool from Amazon.

Could you just have a shower instead?

Yes it is the suction ones I was wondering about and how secure they are. Hopefully my shoulder will become stronger over time, but I am scared that a sudden pull might dislocate it.

I would have a handyman fix one into the wall/tiles for you.
If you had all your weight on the suction type and it came away imagine your injuries if you crashed backwards into the bath.

Having said that I use mine to steady myself if needed in the walk in shower. I don’t have a bath so I’ve never pulled with my full weight on it.

When I moved into my current home last year I fitted one of these strong suction handles to the shower wall. I’m impressed with how firm it has remained on the wall and hasn’t budged. They were £8.99 each when I bought mine.

Simple to fit in seconds. I bought a twin pack and intend to fit the second one on the other bathroom wall when I have my knee replacement later this year.

www.careco.co.uk/12-super-suction-grab-bar/?queryID=935601ba4e301b7fe6fafdc5049479fb&objectID=5126&indexName=magento2_production_default_products

I somehow don’t trust those suction grab-rails.
I have one screwed on to the bathroom tiles .

Our grab rail is screwed into t he tiles and is vey useful.