A few years ago after a skiing tumble, which resulted in a frozen shoulder.
It took 18 months altogether, although I have heard stories of it taking longer.
My treament was of lots of physio and a couple of cortisone injections into the shoulder, the first shot didn’t work however the second one 6 months later helped ease things a lot.
The doctor gave me 3 choices. An operation with keyhole surgery. Or manipulaion under anesthetic (where they literally pull the shoulder out of its frozen state), this one didn’t appeal because they can’t guarentee it will work. The last choice was time spent on exercises and a slow process of healing.
She has my sympathy because at first it’s quite painfull and normal things like dressing yourself or washing up are difficult.
Also for me not being able to mtb was not good for everyone around, mrs grumpy was my nickname.
Edit – forgot to mention that her age may have something to do with it, as it can be a hormonal thing.